Heckler & Koch MP5
Overview
 
The Heckler & Koch MP5 is a 9mm submachine gun
Submachine gun
A submachine gun is an automatic carbine, designed to fire pistol cartridges. It combines the automatic fire of a machine gun with the cartridge of a pistol. The submachine gun was invented during World War I , but the apex of its use was during World War II when millions of the weapon type were...

 of German design, developed in the 1960s by a team of engineers from the German small arms
Small arms
Small arms is a term of art used by armed forces to denote infantry weapons an individual soldier may carry. The description is usually limited to revolvers, pistols, submachine guns, carbines, assault rifles, battle rifles, multiple barrel firearms, sniper rifles, squad automatic weapons, light...

 manufacturer Heckler & Koch GmbH (H&K)
Heckler & Koch
Heckler & Koch GmbH is a German defense manufacturing company that produces various small arms. Some of their products include the SA80, MP5 submachine gun, G3 automatic rifle, the G36 assault rifle, the HK 416, the MP7 personal defense weapon, the USP series of handguns, and the high-precision...

 of Oberndorf am Neckar
Oberndorf am Neckar
Oberndorf am Neckar is a town in the district of Rottweil, in Baden-Württemberg, Germany. It is situated on the river Neckar, 15 km north of Rottweil.-Geography:...

.

The MP5 is currently one of the most widely used submachine guns in the world, having been adopted by numerous military, law enforcement, intelligence and security organizations. In the 1990s, Heckler & Koch developed the Heckler & Koch UMP
Heckler & Koch UMP
The UMP is a submachine gun developed and manufactured by Heckler & Koch. The UMP has been adopted by various agencies such as the U.S. Customs and Border Protection...

, the MP5's successor, though both remain in production.
Heckler & Koch, encouraged by the success of the G3
Heckler & Koch G3
The G3 is a 7.62mm battle rifle developed in the 1950s by the German armament manufacturer Heckler & Koch GmbH in collaboration with the Spanish state-owned design and development agency CETME ....

 automatic rifle
Automatic rifle
Automatic rifle is a term generally used to describe a semi-automatic rifle chambered for a rifle cartridge, capable of delivering both semi- and full automatic fire...

, developed a family of small arms consisting of four types of firearms
Firearm
A firearm is a weapon that launches one, or many, projectile at high velocity through confined burning of a propellant. This subsonic burning process is technically known as deflagration, as opposed to supersonic combustion known as a detonation. In older firearms, the propellant was typically...

 (all based on a common G3 design layout and operating principle), where the first type was chambered in 7.62x51mm NATO, the second—using the 7.62x39mm M43 round, third—the intermediate 5.56x45mm NATO
5.56x45mm NATO
5.56×45mm NATO is a rifle cartridge developed in the United States and originally chambered in the M16 rifle. Under STANAG 4172, it is a standard cartridge for NATO forces as well as many non-NATO countries. It is derived from, but not identical to, the .223 Remington cartridge...

 caliber and the fourth type—chambering the 9x19mm Parabellum pistol
Pistol
When distinguished as a subset of handguns, a pistol is a handgun with a chamber that is integral with the barrel, as opposed to a revolver, wherein the chamber is separate from the barrel as a revolving cylinder. Typically, pistols have an effective range of about 100 feet.-History:The pistol...

 cartridge.
Encyclopedia
The Heckler & Koch MP5 is a 9mm submachine gun
Submachine gun
A submachine gun is an automatic carbine, designed to fire pistol cartridges. It combines the automatic fire of a machine gun with the cartridge of a pistol. The submachine gun was invented during World War I , but the apex of its use was during World War II when millions of the weapon type were...

 of German design, developed in the 1960s by a team of engineers from the German small arms
Small arms
Small arms is a term of art used by armed forces to denote infantry weapons an individual soldier may carry. The description is usually limited to revolvers, pistols, submachine guns, carbines, assault rifles, battle rifles, multiple barrel firearms, sniper rifles, squad automatic weapons, light...

 manufacturer Heckler & Koch GmbH (H&K)
Heckler & Koch
Heckler & Koch GmbH is a German defense manufacturing company that produces various small arms. Some of their products include the SA80, MP5 submachine gun, G3 automatic rifle, the G36 assault rifle, the HK 416, the MP7 personal defense weapon, the USP series of handguns, and the high-precision...

 of Oberndorf am Neckar
Oberndorf am Neckar
Oberndorf am Neckar is a town in the district of Rottweil, in Baden-Württemberg, Germany. It is situated on the river Neckar, 15 km north of Rottweil.-Geography:...

.

The MP5 is currently one of the most widely used submachine guns in the world, having been adopted by numerous military, law enforcement, intelligence and security organizations. In the 1990s, Heckler & Koch developed the Heckler & Koch UMP
Heckler & Koch UMP
The UMP is a submachine gun developed and manufactured by Heckler & Koch. The UMP has been adopted by various agencies such as the U.S. Customs and Border Protection...

, the MP5's successor, though both remain in production.

History

Heckler & Koch, encouraged by the success of the G3
Heckler & Koch G3
The G3 is a 7.62mm battle rifle developed in the 1950s by the German armament manufacturer Heckler & Koch GmbH in collaboration with the Spanish state-owned design and development agency CETME ....

 automatic rifle
Automatic rifle
Automatic rifle is a term generally used to describe a semi-automatic rifle chambered for a rifle cartridge, capable of delivering both semi- and full automatic fire...

, developed a family of small arms consisting of four types of firearms
Firearm
A firearm is a weapon that launches one, or many, projectile at high velocity through confined burning of a propellant. This subsonic burning process is technically known as deflagration, as opposed to supersonic combustion known as a detonation. In older firearms, the propellant was typically...

 (all based on a common G3 design layout and operating principle), where the first type was chambered in 7.62x51mm NATO, the second—using the 7.62x39mm M43 round, third—the intermediate 5.56x45mm NATO
5.56x45mm NATO
5.56×45mm NATO is a rifle cartridge developed in the United States and originally chambered in the M16 rifle. Under STANAG 4172, it is a standard cartridge for NATO forces as well as many non-NATO countries. It is derived from, but not identical to, the .223 Remington cartridge...

 caliber and the fourth type—chambering the 9x19mm Parabellum pistol
Pistol
When distinguished as a subset of handguns, a pistol is a handgun with a chamber that is integral with the barrel, as opposed to a revolver, wherein the chamber is separate from the barrel as a revolving cylinder. Typically, pistols have an effective range of about 100 feet.-History:The pistol...

 cartridge. The MP5 was created within the fourth group of firearms and was initially known as the HK54.

Work on the MP5 began in 1964 and scarcely two years later it was adopted by the German Federal Police
German Federal Police
The Bundespolizei is a uniformed federal police force in Germany. It is subordinate to the Federal Ministry of the Interior...

, border guard and army special forces.

The MP5 is manufactured under license in several nations including Greece (formerly at EBO - Hellenic Arms Industry, currently at EAS - Hellenic Defense Systems
EAS (weapons)
EAS is the company formed by the merger in 2004 of the Greek state Defense Companies EBO and Pyrkal. It is a huge organization with several factories and thousands of employees, with a product range that includes most land weapons in use today, as well as an established exporter to many countries...

), Iran
Iran
Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

 (Defense Industries Organization
Defense Industries Organization
The Defense Industries Organization The Defense Industries Organization The Defense Industries Organization (DIO; Persian: Sasadjah (Sazemane Sanaye Defa) is a conglomerate of companies run by the Islamic Republic of Iran whose function is to provide the military of Iran with the necessary...

), Mexico (SEDENA), Pakistan
Pakistan
Pakistan , officially the Islamic Republic of Pakistan is a sovereign state in South Asia. It has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by Afghanistan and Iran in the west, India in the east and China in the far northeast. In the north, Tajikistan...

 (Pakistan Ordnance Factories
Pakistan Ordnance Factories
Pakistan Ordnance Factories was founded in 1951 with the primary objective of producing arms and ammunition for the armed forces of Pakistan...

), Saudi Arabia
Saudi Arabia
The Kingdom of Saudi Arabia , commonly known in British English as Saudi Arabia and in Arabic as as-Sa‘ūdiyyah , is the largest state in Western Asia by land area, constituting the bulk of the Arabian Peninsula, and the second-largest in the Arab World...

, Sudan
Sudan
Sudan , officially the Republic of the Sudan , is a country in North Africa, sometimes considered part of the Middle East politically. It is bordered by Egypt to the north, the Red Sea to the northeast, Eritrea and Ethiopia to the east, South Sudan to the south, the Central African Republic to the...

 (Military Industry Corporation
Military Industry Corporation (Sudan)
The Military Industrial Corporation is the state-run defense corporation of Sudan. It is responsible for the production of a wide range of defense equipment, such as main battle tanks, ammunition and electronics.-History:...

), Turkey
Turkey
Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...

 (MKEK
Mechanical and Chemical Industry Corporation (Turkey)
The Mechanical and Chemical Industry Corporation , established in 1950, is a reorganization of government-controlled group of factories in Turkey that supplied the Turkish Army with supplies, munitions and equipment.-History:...

), and the United Kingdom (initially at Royal Ordnance
Royal Ordnance
Royal Ordnance plc was formed on 2 January 1985 as a public corporation, owning the majority of what until then were the remaining United Kingdom government-owned Royal Ordnance Factories which manufactured explosives, ammunition, small arms including the Lee-Enfield rifle, guns and military...

, later diverted to Heckler & Koch Great Britain).

Design details

The primary version of the MP5 family is the MP5A2, which is a lightweight, air-cooled, selective fire
Selective fire
A selective fire firearm has at least one semi–automatic and one automatic mode, which is activated by means of a selector which varies depending on the weapon's design. Some selective fire weapons utilize burst fire mechanisms to limit the maximum or total number of shots fired automatically in...

 delayed blowback operated 9x19mm Parabellum weapon with a roller-delayed bolt. It fires from a closed bolt
Closed bolt
A semi or full-automatic firearm which is said to fire from a closed bolt is one where, when ready to fire, a round is in the chamber and the bolt and working parts are forward...

 (bolt forward) position.

The fixed, free floating
Free-floating barrel
A free-floating barrel is a specific design technology used in highly accurate rifles, particularly match grade rifles, to increase the accuracy of the weapon.With normal rifles, the barrel rests in contact with the stock...

, cold hammer-forged barrel has 6 right-hand grooves with a 1 in 250 mm (1:10 in) rifling
Rifling
Rifling is the process of making helical grooves in the barrel of a gun or firearm, which imparts a spin to a projectile around its long axis...

 twist rate and is pressed and pinned into the receiver.

Features

The first MP5 models used a double-column straight box magazine, but since 1977, slightly curved, steel
Steel
Steel is an alloy that consists mostly of iron and has a carbon content between 0.2% and 2.1% by weight, depending on the grade. Carbon is the most common alloying material for iron, but various other alloying elements are used, such as manganese, chromium, vanadium, and tungsten...

 magazines are used with a 15-round capacity (weighing 0.12 kg) or a 30-round capacity (0.17 kg empty).

The adjustable iron sight
Iron sight
Iron sights are a system of shaped alignment markers used as a sighting device to assist in the aiming of a device such as a firearm, crossbow, or telescope, and exclude the use of optics as in telescopic sights or reflector sights...

s (closed type) consist of a rotating rear diopter drum and a front post installed in a hooded ring. The rear sight is adjustable for both windage and elevation with the use of a special tool; the drum provides four different apertures of varying width used for firing at 25, 50, 75 and 100 m.

The MP5 has a hammer firing mechanism. The trigger group is housed inside an interchangeable polymer
Polymer
A polymer is a large molecule composed of repeating structural units. These subunits are typically connected by covalent chemical bonds...

 trigger module (with an integrated pistol grip) and equipped with a 3-position fire mode selector that serves as the manual safety toggle. The “S” or Sicher position in white denotes weapon safe, “E” or Einzelfeuer in red represents single fire, and “F” or Feuerstoß (also marked in red) designates continuous fire. The SEF symbols appear on both sides of the plastic trigger group. The selector lever is actuated with the thumb of the shooting hand and is located only on the left side of the original SEF trigger group or on both sides of the ambidextrous trigger groups. The safety/selector is rotated into the various firing settings or safety position by depressing the tail end of the lever. Tactile clicks (stops) are present at each position to provide a positive stop and prevent inadvertent rotation. The "safe" setting disables the trigger by blocking the hammer release with a solid section of the safety axle located inside the trigger housing.

The non-reciprocating cocking handle
Cocking handle
The cocking handle is a device on a firearm which, when operated, results in the hammer or striker being cocked or moved to the ready position...

 is located above the handguard and protrudes from the cocking handle tube at approx. a 45° angle. This rigid control is attached to a tubular piece within the cocking lever housing called the cocking lever support, which in turn, makes contact with the forward extension of the bolt group. It is not however connected to the bolt carrier and therefore cannot be used as a forward assist
Forward assist
The forward assist on a rifle is a button found commonly on M16 and AR-15 styled rifles, usually located near the bolt closure, that when hit will push the bolt carrier forward, ensuring that the bolt is locked. In order to ensure that the extractor is clipped around the rim of the shell, the...

 to fully seat the bolt group. The cocking handle is held in a forward position by a spring detent located in the front end of the cocking lever support which engages in the cocking lever housing. The lever is locked back by pulling it fully to the rear and rotating it slightly clockwise where it can be hooked into an indent in the cocking lever tube.

Operating mechanism

The bolt rigidly engages the barrel extension – a cylindrical component welded to the receiver
Receiver (firearms)
In firearms terminology, the receiver is the part of a firearm that houses the operating parts. The receiver usually contains the bolt carrier group, trigger group, and magazine port. In most handguns, the receiver, or frame, holds the magazine well or rotary magazine as well as the trigger mechanism...

 into which the barrel is pinned. The delay mechanism is of the same design as that used in the G3 rifle. The two-part bolt consists of a bolt head with rollers and a bolt carrier. The heavier bolt carrier lies up against the bolt head when the weapon is ready to fire and inclined planes on the front locking piece lie between the rollers and force them out into recesses in the barrel extension.

When fired, expanding propellant gases produced from the burning powder in the cartridge
Cartridge (firearms)
A cartridge, also called a round, packages the bullet, gunpowder and primer into a single metallic case precisely made to fit the firing chamber of a firearm. The primer is a small charge of impact-sensitive chemical that may be located at the center of the case head or at its rim . Electrically...

 exert rearward pressure on the bolt head transferred through the base of the cartridge case as it is propelled out of the chamber. A portion of this force is transmitted through the rollers projecting from the bolt head, which are cammed inward against the inclined flanks of the locking recesses in the barrel extension and to the angled shoulders of the locking piece. The selected angles of the recesses and the incline on the locking piece produce a velocity ratio of about 4:1 between the bolt carrier and the bolt head. This results in a calculated delay, allowing the projectile to exit the barrel and gas pressure to drop to a safe level before the case is extracted from the chamber.
The delay results from the amount of time it takes for enough recoil energy to be transferred through to the bolt carrier in a sufficient quantity for it to be driven to the rear against the force of inertia of the bolt carrier and the forward pressure exerted against the bolt by the recoil spring. As the rollers are forced inward they displace the locking piece and propel the bolt carrier to the rear. The bolt carrier's rearward velocity is four times that of the bolt head since the cartridge remains in the chamber for a short period of time during the initial recoil impulse. After the bolt carrier has traveled rearward 4 mm, the locking piece is withdrawn fully from the bolt head and the rollers are compressed into the bolt head. Only once the locking rollers are fully cammed into the bolt head can the entire bolt group continue its rearward movement in the receiver, breaking the seal in the chamber and continuing the feeding cycle.

Since the 9x19mm Parabellum cartridge is relatively low powered, the bolt does not have an anti-bounce device like the G3, but instead the bolt carrier contains tungsten
Tungsten
Tungsten , also known as wolfram , is a chemical element with the chemical symbol W and atomic number 74.A hard, rare metal under standard conditions when uncombined, tungsten is found naturally on Earth only in chemical compounds. It was identified as a new element in 1781, and first isolated as...

 granules that prevent the bolt group from bouncing back after impacting the barrel extension. The weapon has a fluted chamber that enhances extraction reliability by bleeding gases backwards into the shallow flutes running along the length of the chamber to prevent the cartridge case from expanding and sticking to the chamber walls (since the bolt is opened under relatively high barrel pressure). A spring extractor is installed inside the bolt head and holds the case securely until it strikes the ejector arm and is thrown out of the ejection port to the right of the receiver. The lever-type ejector is located inside the trigger housing (activated by the movement of the recoiling bolt).

Accessories

Three lugs are provided at the muzzle that are used to work with certain muzzle devices made by Heckler & Koch, including: a slotted flash suppressor
Flash suppressor
A flash suppressor, also known as a flash guard, flash eliminator, flash hider, or flash cone, is a device attached to the muzzle of a rifle or other gun that reduces the visible signature of the burning gases that exit the muzzle. This reduces the chances that the shooter will be blinded in dark...

, blank firing attachment
Blank-firing adaptor
A blank-firing adaptor or blank-firing attachment , sometimes called a blank adaptor or blank attachment, is a device used in conjunction with blank ammunition. Blank firing adapters are required for allowing blanks to cycle most automatic firearms.-Design:The design of the blank firing adapter...

 (marked with a red painted band denoting use with blank ammunition only), an adaptor for launching rifle grenade
Rifle grenade
A rifle grenade is a grenade that uses a rifle-based launcher to permit a longer effective range than would be possible if the grenade was thrown by hand...

s (for use with rifle-style grenades with an inside diameter of 22 mm using a special grenade launching cartridge) and a cup-type attachment used to launch tear gas grenades.

The receiver housing has notches that permit the attachment of a standard Heckler & Koch quick-detachable scope mount (also used with the G3
Heckler & Koch G3
The G3 is a 7.62mm battle rifle developed in the 1950s by the German armament manufacturer Heckler & Koch GmbH in collaboration with the Spanish state-owned design and development agency CETME ....

, HK33 and G3SG/1) that can be used to mount daytime optical sights (telescopic 4x24), night sights or a halogen flashlight. It can be used with reflex sights and laser
Laser
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of photons. The term "laser" originated as an acronym for Light Amplification by Stimulated Emission of Radiation...

 pointers. The mount features two spring-actuated bolts, positioned along the base of the mount, which exert pressure on the receiver to hold the mount in the same position at all times assuring zero retention. All versions of the quick-detachable scope mount provide a sighting tunnel through the mount so that the shooter can continue to use the fixed iron sights with the scope mount attached to the top of the receiver.

Variants

The MP5A2 has a fixed stock (made of a synthetic polymer), whereas the compact MP5A3 has a retractable metal stock.

In the early 1970s HK
Heckler & Koch
Heckler & Koch GmbH is a German defense manufacturing company that produces various small arms. Some of their products include the SA80, MP5 submachine gun, G3 automatic rifle, the G36 assault rifle, the HK 416, the MP7 personal defense weapon, the USP series of handguns, and the high-precision...

 introduced a conversion kit for the MP5 that enables it to use sporting ammunition (.22 LR). This unit consists of a barrel insert, a bolt group and two 20-round magazines. This modification reduces the cyclic rate to 650 rounds/min.

The MP5A2 and MP5A3 are available with optional 4-position trigger groups; these are known as the MP5A4 and MP5A5 respectively. The trigger groups are marked with bullet pictograms rather than letters or numbers (each symbol represents the number of bullets that will be fired when the trigger is pulled and held rearward with a full magazine inserted in the weapon) and are fully ambidextrous (the selector lever is present on each side of the trigger housing). The additional setting of the fire selector, one place before the fully automatic setting, enables a two or three-shot burst firing mode. H&K offers dedicated training variants of these weapons, designated MP5A4PT and MP5A5PT (PT – Plastic Training), modified to fire a plastic 9x19mm PT training cartridge produced by Dynamit Nobel
Dynamit Nobel AG
Dynamite Nobel AG is a German chemical and weapons company whose headquarters was based in Troisdorf. It was founded in 1865 by Alfred Nobel.-Creation:...

 of Germany. These weapons operate like the standard MP5 but have a floating chamber and the bolt lacks both rollers to function properly when firing the lighter plastic projectiles. To help identify these weapons blue dots were painted on their cocking handles and additional lettering provided. The PT variant can be configured with various buttstocks and trigger groups and was developed for the West German Police and Border Guard.

The modular design of the MP5 offers multiple trigger groups: three-position "SEF" fire selector (positions: "S"-safe, "E"-semi automatic, "F" fully automatic. Located on left of receiver only); three-position fire selector (positions: safe, semiautomatic and a 2 or 3-round burst; selector lever is ambidextrous and its settings are marked with pictograms); four-position fire selector (positions: weapon safe, single fire, 2 or 3-round burst, full auto; ambidextrous selector; selector settings marked with pictograms); two-position fire control group (positions: weapon safe, single fire only; ambidextrous selector lever with pictograms) and a three-position fire selector group – the so called “Navy” trigger (settings: weapon safe, semi-automatic, fully automatic fire; ambidextrous selector lever; selector settings marked with bullet symbols again).

A variant with the last trigger group designated the MP5-N (N – Navy) was developed in 1986 for the United States Navy
United States Navy
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

. This model has a collapsible stock, a tritium
Tritium
Tritium is a radioactive isotope of hydrogen. The nucleus of tritium contains one proton and two neutrons, whereas the nucleus of protium contains one proton and no neutrons...

-illuminated front sight post and a 225 mm (8.9 in) threaded barrel for use with a stainless steel
Stainless steel
In metallurgy, stainless steel, also known as inox steel or inox from French "inoxydable", is defined as a steel alloy with a minimum of 10.5 or 11% chromium content by mass....

 sound suppressor
Suppressor
A suppressor, sound suppressor, sound moderator, or silencer, is a device attached to or part of the barrel of a firearm which reduces the amount of noise and flash generated by firing the weapon....

 made by Knight's Armament Company
Knight's Armament Company
Knight's Armament Company is an American firearms and firearms parts manufacturer.It is owned by C. Reed Knight and based in Titusville, Florida. KAC is best known for producing the Rail Interface System and the Rail Adapter System grips for military firearms...

 together with quieter subsonic ammunition.

Civilian variants

The MP5SFA2 (SF - single-fire) is the same as the MP5A2 but is fitted with an ambidextrous semi-automatic only trigger group. Versions delivered after December 1991 are assembled with select-fire bolt carriers allowing fully automatic operation when used with the appropriate trigger module. Developed in 1986 in response to the American FBI
Federal Bureau of Investigation
The Federal Bureau of Investigation is an agency of the United States Department of Justice that serves as both a federal criminal investigative body and an internal intelligence agency . The FBI has investigative jurisdiction over violations of more than 200 categories of federal crime...

 solicitation for "9 mm Single-fire Carbines". The MP5SFA3 features a retractable metal stock.

The two-position trigger unit was used in the single-fire HK94 carbine
Carbine
A carbine , from French carabine, is a longarm similar to but shorter than a rifle or musket. Many carbines are shortened versions of full rifles, firing the same ammunition at a lower velocity due to a shorter barrel length....

 that was produced specifically for the civilian market with a 420 mm (16.5 in) barrel.

Suppressed variants

In 1974 H&K initiated design work on a sound-suppressed variant of the MP5, designated the MP5SD (SD – Schalldämpfer German for "sound suppressor"), which features an integral but detachable aluminium
Aluminium
Aluminium or aluminum is a silvery white member of the boron group of chemical elements. It has the symbol Al, and its atomic number is 13. It is not soluble in water under normal circumstances....

 sound suppressor and a lightweight bolt. The weapon's 146 mm (5.7 in) barrel has 30 2.5 mm (0.0984251968503937 in) ports drilled forward of the chamber through which escaping gases are diverted to the surrounding sealed tubular casing that is screwed on to threading on the barrel’s external surface just prior to the ported segment. The suppressor itself is divided into two stages; the initial segment surrounding the ported barrel serves as an expansion chamber for the propellant gases, reducing gas pressure to slow down the acceleration of the projectile. The second, decompression stage occupies the remaining length of the suppressor tube and contains a stamped metal helix separator with several compartments which increase the gas volume and decrease its temperature, deflecting the gases as they exit the muzzle, so muffling the exit report. The bullet leaves the muzzle at subsonic velocity, so it does not generate a sonic shock wave
Shock wave
A shock wave is a type of propagating disturbance. Like an ordinary wave, it carries energy and can propagate through a medium or in some cases in the absence of a material medium, through a field such as the electromagnetic field...

 in flight. As a result of reducing the barrel’s length and venting propellant gases into the suppressor, the bullet’s muzzle velocity was lowered anywhere from 16% to 26% (depending on the ammunition used) while maintaining the weapon’s automation and reliability. The weapon was designed to be used with standard supersonic ammunition with the suppressor on at all times.

The MP5SD is produced exclusively by H&K in several versions: the MP5SD1 and MP5SD4 (both have a receiver end cap instead of a buttstock), MP5SD2 and MP5SD5 (equipped with a fixed synthetic buttstock) and the MP5SD3 and MP5SD6 (fitted with a collapsible metal stock). The MP5SD1, MP5SD2 and MP5SD3 use a standard "SEF" trigger group (from the MP5A2 and MP5A3), while the MP5SD4, MP5SD5 and MP5SD6 – a trigger module with a mechanically limited 3-round burst mode and ambidextrous selector controls (from the MP5A4 and MP5A5). A suppressed version was produced for the U.S. Navy - designated the MP5SD-N, which is a version of the MP5SD3 with a retractable metal stock, front sight post with tritium-illuminated dot and a stainless steel suppressor. This model has a modified cocking handle support to account for the slightly larger outside diameter of the suppressor. The design of the suppressor allows the weapon to be fired with water inside, should water enter the device during operation in or near water.

MP5K

In 1976 a shortened version of the MP5A2 was introduced; the MP5K (K from the German word Kurz = "short") was designed for close quarters battle use by clandestine operations and special services. The MP5K does not have a shoulder stock (the receiver end was covered with a flat end cap, featuring a buffer on the inside and a sling loop on the outside), and the bolt and receiver were shortened at the rear. The resultant lighter bolt led to a higher rate of fire than the standard MP5. The barrel, cocking handle and its cover were shortened and a vertical foregrip was used to replace the standard handguard. The barrel ends at the base of the foresight, which prevents the use of any sort of muzzle device.

The MP5K is produced (by Heckler & Koch and under license in Iran
Iran
Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

 and Turkey
Turkey
Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...

) in four different versions: the MP5K, MP5KA4, MP5KA1, MP5KA5, where the first two variants have adjustable, open-type iron sights (with a notched rotary drum), and the two remaining variants - fixed open sights, however the front sight post was changed and a notch was cut into the receiver top cover. The MP5K retained the capability to use optical sights through the use of an adapter.

A civilian semiautomatic derivative of the MP5K known as the SP89 was produced that had a foregrip with a muzzle guard in place of the vertical grip.

In 1991 a further variant of the MP5K was developed, designated the MP5K-PDW (PDW – Personal Defense Weapon) that retained the compact dimensions of the MP5K but restored the fire handling characteristics of the full-size MP5A2. The MP5K-PDW uses a side-folding synthetic shoulder stock (made by the U.S. company Choate Machine and Tool), a “Navy” trigger group, a front sight post with a built-in tritium insert and a slightly lengthened threaded, three-lug barrel (analogous to the MP5-N). The stock can be removed and replaced with a receiver endplate; a rotary drum with apertures from the MP5A2 can also be used.

Larger caliber versions

In 1991, Heckler & Koch introduced the MP5/10 (chambered in 10mm Auto) and MP5/40 (chambered for the .40 S&W
.40 S&W
The .40 S&W is a rimless pistol cartridge developed jointly by major American firearms manufacturers Winchester and Smith & Wesson. The .40 S&W was developed from the ground up as a law enforcement cartridge designed to duplicate performance of the FBI's reduced velocity 10mm cartridge which could...

 cartridge), which are based on the MP5A4 and MP5A5. These weapons were assembled in fixed and retractable stock configurations (without a separate designation) and are fed from translucent 30-round polymer box magazines. These weapons include a bolt hold-open device, which captures the bolt group in its rear position after expending the last cartridge from the magazine. The bolt is then released by pressing a lever positioned on the left side of the receiver. Both weapons use a barrel with 6 right-hand grooves and a 380 mm (1:15 in) twist rate, and like the MP5-N, both have a 3-lugged muzzle device and a tritium-illuminated front sight aiming dot.

Variants list

  • HK54: The original model that was produced in the mid 1960s. It later became known as the MP5A1, a very slightly modified version. No buttstock (endplate/receiver cap in place of buttstock), "Navy"/"SEF" trigger group.
  • MP5A2: Fixed buttstock, "SEF" trigger group.
  • MP5SFA2: Fixed buttstock, single-fire (SF) trigger group.
  • MP5A3: Retractable buttstock,"SEF" trigger group.
  • MP5SFA3: Semi-automatic carbine version of MP5A3.Retractable buttstock and single-fire (SF) trigger group.
  • MP5A4: Fixed buttstock, 3-round burst trigger group.
  • MP5A5: Retractable buttstock, 3-round burst trigger group.
  • MP5-N: Model developed specifically for the U.S. Navy
    United States Navy
    The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

    . Ambidextrous "Navy" trigger group, 3-lug/threaded barrel for attaching a sound suppressor; retractable stock.
  • MP5F: Model developed specifically for the French military
    Military of France
    The French Armed Forces encompass the French Army, the French Navy, the French Air Force and the National Gendarmerie. The President of the Republic heads the armed forces, with the title "chef des armées" . The President is the supreme authority for military matters and is the sole official who...

    . Rubber-padded retractable stock, ambidextrous sling loops/bolts and internal modifications to handle high-pressure ammunition.
  • MP5K: Short (Kurz) version, "SEF" trigger group.
    • MP5KA1: MP5K with smooth upper surface and small iron sights; "SEF" trigger group.
    • MP5KA4: MP5K with 3-round burst trigger group.
    • MP5KA5: MP5KA1 with 3-round burst trigger group.
    • MP5K-N: MP5K with "Navy" trigger group and 3-lug/threaded barrel for mounting suppressors or other muzzle attachments.
    • MP5K-PDW: Personal Defense Weapon
      Personal defense weapon
      A personal defense weapon is a compact semi-automatic or fully automatic firearm similar in most respects to a submachine gun, but firing an armor-piercing rifle round, giving a PDW better range, accuracy and armor-penetrating capability than submachine guns, which fire pistol-caliber cartridges...

      ; MP5K-N with added folding stock and 3-lug/threaded barrel for mounting of suppressors; "Navy" or 3-round burst trigger group. Introduced in 1991.
  • MP5SD1: No buttstock (endplate/receiver cap in place of buttstock), "SEF" trigger group, integrated suppressor (Schalldämpfer)
  • MP5SD2: Fixed buttstock, "SEF" trigger group, integrated suppressor.
  • MP5SD3: Retractable buttstock, "SEF" trigger group, integrated suppressor.
  • MP5SD4: No buttstock (endplate/receiver cap in place of buttstock), 3-round burst trigger group, integrated suppressor.
  • MP5SD5: Fixed buttstock, 3-round burst trigger group, integrated suppressor.
  • MP5SD6: Retractable buttstock, 3-round burst trigger group, integrated suppressor.
  • MP5SD-N1: Retractable buttstock, "Navy" trigger group, KAC
    Knight's Armament Company
    Knight's Armament Company is an American firearms and firearms parts manufacturer.It is owned by C. Reed Knight and based in Titusville, Florida. KAC is best known for producing the Rail Interface System and the Rail Adapter System grips for military firearms...

     stainless steel suppressor.
  • MP5SD-N2: Fixed buttstock, "Navy" trigger group, KAC
    Knight's Armament Company
    Knight's Armament Company is an American firearms and firearms parts manufacturer.It is owned by C. Reed Knight and based in Titusville, Florida. KAC is best known for producing the Rail Interface System and the Rail Adapter System grips for military firearms...

     stainless steel suppressor.
  • MP5/10: Chambered in 10mm Auto, available in various stock/trigger group configurations. It was produced from 1992 to 2000.
  • MP5/40: Chambered in .40 S&W
    .40 S&W
    The .40 S&W is a rimless pistol cartridge developed jointly by major American firearms manufacturers Winchester and Smith & Wesson. The .40 S&W was developed from the ground up as a law enforcement cartridge designed to duplicate performance of the FBI's reduced velocity 10mm cartridge which could...

    , available in various stock/trigger group configurations. It was produced from 1992 to 2000.
  • HK94: American import model of the MP5 with a 16 in barrel and special safe/semi-automatic trigger group, designed for civilian use. It was made from 1983 to 1989, in three different configurations.
  • SP89: Sport Pistole M1989. Semi-automatic only version of the MP5K designed for civilian use. It had a modified foregrip redesigned into a traditional handguard to make it compliant with the Semi-Auto Weapons Ban of 1989. It was made from 1989 to 1994.

Users

Garda e Republikes.: Royal Australian Air Force
Royal Australian Air Force
The Royal Australian Air Force is the air force branch of the Australian Defence Force. The RAAF was formed in March 1921. It continues the traditions of the Australian Flying Corps , which was formed on 22 October 1912. The RAAF has taken part in many of the 20th century's major conflicts...

 Airfield Defence Guards
Airfield Defence Guards
The Airfield Defence Guard mustering of the Royal Australian Air Force performs specialist ground defence tasks to protect air power assets from hostile ground action. The mustering is composed of non-commissioned members, commonly called 'ADGies,' most of whom are employed within an Airfield...

, Special Operations Command
Special Operations Command (Australia)
The Special Operations Command is a command within the Australian Defence Force . Special Operations Command was established in May 2003, to unite all of the ADF special forces units. As of 2007 Special Operations Command is fully operational. Australia's Special Operations Command is of...

, and all Police Tactical Group
Police Tactical Group
Police tactical groups , formerly known as "police assault groups", are part of the Australian government's National Anti-Terrorism Plan which, since 1978, has required each state and territory police force to maintain a specialised counter-terrorist and hostage rescue unit jointly funded by the...

s. : EKO Cobra
EKO Cobra
EKO Cobra is Austria's foremost counter-terrorism special operations tactical unit. It is not part of the Austrian Federal Police but is directly under the control of the Austrian Federal Ministry for the Interior.-History:...

.: Army, Special Forces, Rapid Action Battalion, and Bangladesh Navy
Bangladesh Navy
The Bangladesh Navy is the naval arm of the Bangladesh Armed Forces. At present the navy is mostly limited to coastal patrolling, however it is implementing an ambitious procurement and expansion program to ensure the security of Bangladesh's maritime boundary...

 Special Warfare Diving And Salvage
Special Warfare Diving and Salvage
The Special Warfare Diving and Salvage or SWADS is an elite Special Operations Force of the Bangladesh Navy.-Organization:The Bangladesh Special Warfare Diving and Salvage is a specially organized and elite team of highly trained personnel who are equipped and trained using many of the same...

.: Special Police Operations Battalion and National Force of Public Safety: 160 imported in 2009.: Canadian Forces
Canadian Forces
The Canadian Forces , officially the Canadian Armed Forces , are the unified armed forces of Canada, as constituted by the National Defence Act, which states: "The Canadian Forces are the armed forces of Her Majesty raised by Canada and consist of one Service called the Canadian Armed Forces."...

 Naval Boarding Party, Royal Canadian Mounted Police
Royal Canadian Mounted Police
The Royal Canadian Mounted Police , literally ‘Royal Gendarmerie of Canada’; colloquially known as The Mounties, and internally as ‘The Force’) is the national police force of Canada, and one of the most recognized of its kind in the world. It is unique in the world as a national, federal,...

.: Used by Chongqing
Chongqing
Chongqing is a major city in Southwest China and one of the five national central cities of China. Administratively, it is one of the PRC's four direct-controlled municipalities , and the only such municipality in inland China.The municipality was created on 14 March 1997, succeeding the...

 SWAT
SWAT
A SWAT team is an elite tactical unit in various national law enforcement departments. They are trained to perform high-risk operations that fall outside of the abilities of regular officers...

 (NR-08, Chinese copy of MP5): UEA (Unidad Especial de Apoyo) Special Police Unit: Lučko Anti-Terrorist Unit : URNA counter-terrorist group and other units of the armed forces (MP5A5, MP5SD6, MP5K-PDW).:Estonian Police
Estonian Police
The Estonian Police are the law enforcement agency of Estonia.- Structure :They are under the supervision of the Ministry of Internal Affairs, which supervises five central agencies – the Police Board, the Security Police Board, the Police and Border Guard Board and the Rescue Board...

.: Finnish Defence Forces
Finnish Defence Forces
The Finnish Defence Forces are responsible for the defence of Finland. It is a cadre army of 15,000, of which 8,900 are professional soldiers , extended with conscripts and reservists such that the standard readiness strength is 34,700 people in uniform...

 under designation 9.00 konepistooli 2000.: GIGN
Groupe d'Intervention de la Gendarmerie Nationale
The National Gendarmerie Intervention Group, commonly abbreviated GIGN , is a special operations unit of the French Armed Forces. It is part of the National Gendarmerie and is trained to perform counter-terrorist and hostage rescue missions in France or anywhere else in the world.The GIGN was...

 and certain specialized units within the French Army
French Army
The French Army, officially the Armée de Terre , is the land-based and largest component of the French Armed Forces.As of 2010, the army employs 123,100 regulars, 18,350 part-time reservists and 7,700 Legionnaires. All soldiers are professionals, following the suspension of conscription, voted in...

.: MP5K and MP5SD.: Bundespolizei (Federal Police), Landespolizei (State Police)
Landespolizei
thumb|[[Germany|German]] police officer in [[Hamburg]]The Landespolizei are the main police forces of Germany. They are under the sole jurisdiction, funded and operated by the states of Germany.-History:...

, German Army
German Army
The German Army is the land component of the armed forces of the Federal Republic of Germany. Following the disbanding of the Wehrmacht after World War II, it was re-established in 1955 as the Bundesheer, part of the newly formed West German Bundeswehr along with the Navy and the Air Force...

, Feldjäger (Military Police)
Feldjäger
For the German Military Police in WWII see: Feldjaegerkorps and FeldgendarmerieIn presence Feldjäger is the name of military police of the Bundeswehr, Germany's armed forces. The term Feldjäger, literally meaning field huntsmen or field Jäger, has a long tradition and dates back to the mid-17th...

, GSG 9
GSG 9
The GSG 9 der Bundespolizei , is the elite counter-terrorism and special operations unit of the German Federal Police.-History and name:...

 special operations unit and German Navy
German Navy
The German Navy is the navy of Germany and is part of the unified Bundeswehr .The German Navy traces its roots back to the Imperial Fleet of the revolutionary era of 1848 – 52 and more directly to the Prussian Navy, which later evolved into the Northern German Federal Navy...

.: Manufactured locally by Hellenic Defence Systems (EAS
EAS (weapons)
EAS is the company formed by the merger in 2004 of the Greek state Defense Companies EBO and Pyrkal. It is a huge organization with several factories and thousands of employees, with a product range that includes most land weapons in use today, as well as an established exporter to many countries...

: Ellinika Amyntika Systimata). Used by the EKAM
Special Anti-Terrorist Unit
The Special Suppressive Anti-Terrorist Unit is the Greek counter-terrorism unit of the Hellenic Police. It is the most distinguished part of the Hellenic Police...

 counter-terrorist group.: Hong Kong Police Force
Hong Kong Police Force
The Hong Kong Police Force is the largest disciplined service under the Security Bureau of Hong Kong. It is the world's second, and Asia's first, police agency to operate with a modern policing system. It was formed on 1 May 1844, with a strength of 32 officers...

, Airport Security Unit (Hong Kong)
Airport Security Unit (Hong Kong)
The Airport Security Unit formed in 1977, is a special force of the Hong Kong Police Force tasked with the security of the Hong Kong International Airport....

,:Víkingasveitin
Víkingasveitin
Víkingasveitin , officially Sérsveit ríkislögreglustjórans , is Iceland's elite counter-terrorism unit, specializing in various types of armed and unarmed infantry combat. It is in many ways modeled on the Norwegian Delta counter-terrorist unit with which it conducts many exercises, both in Norway...

, Icelandic National Police.: Indian Army
Indian Army
The Indian Army is the land based branch and the largest component of the Indian Armed Forces. With about 1,100,000 soldiers in active service and about 1,150,000 reserve troops, the Indian Army is the world's largest standing volunteer army...

, MARCOS
Marcos
-Sports:* Dayton Marcos, Negro League baseball team from Dayton, Ohio * Nélson Marcos, Portuguese footballer* Marcos Ambrose, Australian racing driver currently competing in NASCAR* Marcos Baghdatis, Cypriot tennis player...

, National Security Guards
National Security Guards
The National Security Guard is a Special Response Unit in India that has primarily been utilized for counter-terrorism activities and was created by the Cabinet Secretariat under the National Security Guard Act of the Indian Parliament in 1986...

, and Maharashtra State Force One
Force One
The Force One is an elite commando force, which is a specialised counter terrorism unit to guard the Mumbai metropolitan area, one of the largest metropolitan areas in the world, formed by Government of Maharashtra on the lines of National Security Guards...

. Also used by the Special Protection Group
Special Protection Group
The Special Protection Group is the executive protection agency of the Government of India. It is responsible for the protection of the Prime Minister of India, other top officials, and their immediate families. The force was established in 1985 after the assassination of Indira Gandhi. It is one...

 until 2008, when it was replaced with the FN P90
FN P90
The FN P90 is a selective fire personal defense weapon designed and manufactured by FN Herstal in Belgium. The P90's name is taken from 1990, the year it was introduced...

 and FN F2000
FN F2000
The FN F2000 is a 5.56×45mm NATO bullpup assault rifle, designed by FN Herstal in Belgium. The F2000 made its debut in March 2001 at the IDEX defense exhibition held in Abu Dhabi, in the United Arab Emirates.-Design details:...

.: Komando Pasukan Katak
KOPASKA
Kopaska or Komando Pasukan Katak is the premier frogman and underwater demolition unit of the Indonesian Navy. The Unit's motto is 'Tan Hana Wighna Tan Sirna', which means 'There is no obstacle that can not be defeated'. It was officially established on March 31, 1962 by President Sukarno to help...

(Kopaska) tactical diver group and Komando Pasukan Khusus
Kopassus
Kopassus is an Indonesian Army special forces group that conducts special operations missions for the Indonesian government, such as direct action, unconventional warfare, sabotage, counter-insurgency, counter-terrorism, and intelligence gathering.Kopassus was founded on April 16, 1952...

(Kopassus) special forces group.: Produced under license.: Irish Army Rangers
Irish Army Rangers
The Army Ranger Wing is the special forces unit of the Irish Defence Forces.The ARW trains and operates with many international special operations units worldwide, including the US Army Rangers, Delta Force, French GIGN, German GSG 9, Polish GROM, Swedish SSG, Italian COMSUBIN, Australian SAS,...

.: Used by the Carabinieri
Carabinieri
The Carabinieri is the national gendarmerie of Italy, policing both military and civilian populations, and is a branch of the armed forces.-Early history:...

.: Jamaica Constabulary Force
Jamaica Constabulary Force
The Jamaica Constabulary Force is the police force of the island nation of Jamaica. The official JCF staff numbers 9,930 plus 55 auxiliary positions, making a total of 9,985; its current strength is 8,441. Its commissioner is Owen Ellington, M.Sc, B.Sc, CD...

.: Special Boarding Unit
Special Boarding Unit
The is a special forces unit established by the Japanese Maritime Self-Defense Forces on March 27, 2001 in response to a previous spy ship incursion that occurred on the Noto Peninsula in 1999. The unit was created to perform similar roles to those undertaken by American Navy SEALs and the British...

.: Kenya Police
Kenya Police
The Kenya Police is a national body in charge of law enforcement in the East Africa State of Kenya. While organised at a national level, each arm reports to a Provincial police authority, which in turn divides its force by local Police Divisions, headquartered at local police stations...

.: Lithuanian Armed Forces.: Unité Spéciale de la Police
Unité Spéciale de la Police
The Unité Spéciale de la Police is a special unit of the Grand Ducal Police that was created in Luxembourg in 1999. It is tasked with responding to especially dangerous situations such as hostage rescue operations, arrests of dangerous individuals, bomb threats, and dignitary protection duties...

intervention unit of the Grand Ducal Police
Grand Ducal Police
The Grand Ducal Police is the primary law enforcement agency in the Grand Duchy of Luxembourg. The police is under the control of the Minister for the Interior of Luxembourg, although they operate in the name, and under the ultimate control, of the Grand Duke. Day-to-day executive control is...

.: Malaysian Armed Forces, Royal Malaysia Police, Royal Malaysian Customs and Malaysian Maritime Enforcement Agency
Malaysian Maritime Enforcement Agency
The Malaysian Maritime Enforcement Agency , the Malaysian Coast Guard version, is the principal government agency tasked with maintaining law and order and coordinating search and rescue operations in the Malaysian Maritime Zone and on the high seas. It is in effect the Coast Guard of Malaysia...

 (A2 and A3 versions). Also used by various counter-terrrorism units Grup Gerak Khas
Grup Gerak Khas
The Grup Gerak Khas is a special forces regiment of the Malaysian Army which conducts special operations missions for the Malaysian government, such as direct action, unconventional warfare, sabotage, counter-terrorism, and intelligence gathering...

, PASKAL
PASKAL
The Royal Malaysian Navy PASukan Khas Laut , commonly known as the PASKAL compose the Special Operations Forces of the Royal Malaysian Navy, employed in direct action and special reconnaissance operations...

 and PASKAU
Paskau
Paskau may refer to:* PASKAU, a special forces unit of the Royal Malaysian Air Force* the town of Paskov in the Czech Republic...

, as well as the Pasukan Gerakan Khas
Pasukan Gerakan Khas
The Pasukan Gerakan Khas is an elite high-profile counter-terrorism and special operations tactical unit of the Royal Malaysia Police...

.: Manufactured under license.: Dutch Royal and Diplomatic security (DKDB).: New Zealand Special Air Service and New Zealand Police
New Zealand Police
The New Zealand Police is the national police force of New Zealand, responsible for enforcing criminal law, enhancing public safety, maintaining order and keeping the peace throughout New Zealand...

 Special Tactics Group
Special Tactics Group
The Special Tactics Group , formerly known as the Anti-Terrorist Squad, is the full-time tactical and counter-terrorism group of the New Zealand Police....

 : Norwegian Armed Forces
Norwegian Armed Forces
The Norwegian Armed Forces numbers about 23,000 personnel, including civilian employees. According to mobilisation plans , the strength during full mobilisation would be approximately 83,000 combatant personnel. Norway has mandatory military service for men and voluntary service for women...

, to be replaced by the MP7. Norwegian Police Service
Norwegian Police Service
The Norwegian Police Service is the official police force in Norway which are run by the Minister of Justice and Police. The department consists of 27 regional areas and seven national special forces. The department has about 11,000 employees....

: Pakistan Army
Pakistan Army
The Pakistan Army is the branch of the Pakistani Armed Forces responsible for land-based military operations. The Pakistan Army came into existence after the Partition of India and the resulting independence of Pakistan in 1947. It is currently headed by General Ashfaq Parvez Kayani. The Pakistan...

, built by Pakistan Ordnance Factories
Pakistan Ordnance Factories
Pakistan Ordnance Factories was founded in 1951 with the primary objective of producing arms and ammunition for the armed forces of Pakistan...

.: Armed Forces of the Philippines
Armed Forces of the Philippines
The Armed Forces of the Philippines is composed of the Philippine Army, Philippine Navy and Philippine Air Force...

, and Philippine National Police
Philippine National Police
The Philippine National Police is the national police force of the Republic of the Philippines. It is both a national and a local police force in that it does provides all law enforcement services throughout the Philippines...

 Special Action Force
Special Action Force
The Special Action Force is the National Mobile Unit of the Philippine National Police. It is formed along the lines of the British Army Special Air Service, but with different recruitment and selection procedures...

 and other police and SWAT units.: GROM
GROM
GROM is one of five special forces units of the Polish Armed Forces. It was officially activated on July 8, 1990...

 special forces unit., FORMOZA special force unit, Police, Border Guard, CBA, ABW, Financial Police, Military Police Special Unit from Warsaw: Grupo de Operações Especiais (GOE).: Land Forces
Romanian Land Forces
The Romanian Land Forces is the army of Romania, and the main component of the Romanian Armed Forces. In recent years, full professionalisation and a major equipment overhaul have transformed the nature of the force.The Romanian Land Forces were founded on...

 Special Operations
Special operations
Special operations are military operations that are considered "special" .Special operations are typically performed independently or in conjunction with conventional military operations. The primary goal is to achieve a political or military objective where a conventional force requirement does...

 battalions.: Singapore Armed Forces Commando Formation
Singapore Armed Forces Commando Formation
The Singapore Armed Forces Commando Formation is an elite branch of the Singapore Armed Forces . An offensive unit, it specialises in pre-emptive operations involving small groups of specially trained soldiers in enemy territory...

.: Various police forces.: Slovenian Armed Forces and Slovenian Police
Law enforcement in Slovenia
Law enforcement in Slovenia is governed by the Slovenian Ministry of Internal Affairs and is the responsibility of the Slovenian National Police force, which is composed of the 8 police directorates in Celje, Koper, Kranj, Ljubljana, Maribor, Murska Sobota, Nova Gorica and Novo mesto...

: Special Task Force
Special Task Force
The Special Task Force is an elite special forces unit of the Sri Lanka Police Service specializing in Counter-Terrorist and Counter-Insurgency operations. It was formed in 1983 not as a military force but rather as a highly specialised police unit...

.: Grupo Especial de Operaciones
Grupo Especial de Operaciones
The Grupo Especial de Operaciones , commonly known as GEOs, are the Special Operations Forces of the Spanish Cuerpo Nacional de Policía of Spain. They are stationed in Guadalajara near the capital, Madrid. The GEO has response capabilities and is responsible for VIP protection duties, as well as...

(GEO).: Manufactured by Military Industry Corporation
Military Industry Corporation (Sudan)
The Military Industrial Corporation is the state-run defense corporation of Sudan. It is responsible for the production of a wide range of defense equipment, such as main battle tanks, ammunition and electronics.-History:...

 as the Tihraga.: Swedish Police Service
Swedish Police Service
The Swedish Police Service is a collection of Government agencies concerned with police matters in Sweden. The Swedish Police Service consists of 28,500 employees of which 39 per cent are women. The staff consists of 20,000 police officers of which 25 per cent are women and 8,500 civilian staff of...

.: Used by various services. Manufactured by MKEK
Mechanical and Chemical Industry Corporation (Turkey)
The Mechanical and Chemical Industry Corporation , established in 1950, is a reorganization of government-controlled group of factories in Turkey that supplied the Turkish Army with supplies, munitions and equipment.-History:...

.: Produced under license. Used by the Special Air Service
Special Air Service
Special Air Service or SAS is a corps of the British Army constituted on 31 May 1950. They are part of the United Kingdom Special Forces and have served as a model for the special forces of many other countries all over the world...

, Police Service of Northern Ireland
Police Service of Northern Ireland
The Police Service of Northern Ireland is the police force that serves Northern Ireland. It is the successor to the Royal Ulster Constabulary which, in turn, was the successor to the Royal Irish Constabulary in Northern Ireland....

, CO19
Specialist Firearms Command
Central Operations Specialist Firearms Command is a Central Operations branch within Greater London's Metropolitan Police Service. The Command is responsible for providing a firearms-response capability, assisting the rest of the service, which is normally unarmed...

, and most Authorised Firearms Officer
Authorised Firearms Officer
An Authorised Firearms Officer is a British police officer who has received training and authorisation to carry and use firearms. The designation is significant because within the United Kingdom, police officers do not routinely carry firearms...

s.: Special Operations Forces
United States Special Operations Command
The United States Special Operations Command is the Unified Combatant Command charged with overseeing the various Special Operations Commands of the Army, Air Force, Navy and Marine Corps of the United States Armed Forces. The command is part of the Department of Defense...

 and FBI Hostage Rescue Team (10mm version). Also used by various police SWAT
SWAT
A SWAT team is an elite tactical unit in various national law enforcement departments. They are trained to perform high-risk operations that fall outside of the abilities of regular officers...

 units at federal, state, and local levels.: Used by the Swiss Guard
Swiss Guard
Swiss Guards or Schweizergarde is the name given to the Swiss soldiers who have served as bodyguards, ceremonial guards, and palace guards at foreign European courts since the late 15th century. They have had a high reputation for discipline, as well as loyalty to their employers...

.

External links

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