Rheinmetall MG3
Encyclopedia
The MG3 is a German
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 general-purpose machine gun chambered for the 7.62x51mm NATO cartridge. The weapon's design is derived from the World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 era MG 42 universal machine gun that fired the 7.92x57mm Mauser
7.92x57mm Mauser
The 8×57mm IS is a rimless bottlenecked rifle cartridge. The 8×57mm IS was adopted by the German Empire in 1905, and was the German service cartridge in both World Wars...

 round.

The MG3 was standardized in the late 1950s and adopted into service with the newly formed Bundeswehr
Bundeswehr
The Bundeswehr consists of the unified armed forces of Germany and their civil administration and procurement authorities...

, where it continues to serve to this day as a squad support weapon and vehicle-mounted machine gun. The weapon and its derivatives have also been acquired by the armed forces of over 30 countries. Production rights to the machine gun were purchased by Italy
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 (MG 42/59), Spain
Spain
Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

, 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...

 (MG 1A3), Greece
Greece
Greece , officially the Hellenic Republic , and historically Hellas or the Republic of Greece in English, is a country in southeastern Europe....

, 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...

, 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...

 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...

.

History

Production of the first postwar variant of the MG 42 chambered in a standard NATO caliber (designated the MG 1) was launched in 1958 at the Rheinmetall
Rheinmetall
Rheinmetall AG is a German automotive and defence company with factories in Düsseldorf, Kassel and Unterlüß. The company has a long tradition of making guns and artillery pieces...

 arms factory as requested by the Bundeswehr
Bundeswehr
The Bundeswehr consists of the unified armed forces of Germany and their civil administration and procurement authorities...

. Shortly thereafter, the machine gun was modified, receiving a chrome
Chrome plating
Chrome plating, often referred to simply as chrome, is a technique of electroplating a thin layer of chromium onto a metal object. The chromed layer can be decorative, provide corrosion resistance, ease cleaning procedures, or increase surface hardness.-Process:A component to be chrome plated will...

-lined barrel and sights properly calibrated for the new round; this model would be named the MG 1A1 (known also as the MG 42/58).

A further development of the MG 1A1 was the MG 1A2 (MG 42/59), which had a heavier bolt (950 g, compared to 550 g), a new friction ring buffer and was adapted to use both the standard German continuous DM1 ammunition belt and the American M13
M13 link
The M13 link, formally Link, M13, is the U.S. military designation for a disintegrating metallic link specifically designed for belt-fed firearms and rounds; it was introduced in the mid-20th century. It is the primary link type for the U.S., and among NATO for 7.62 mm ammunition...

 disintegrating belt. Further improvements to the weapon's muzzle device, bipod
Bipod
A bipod is a support device that is similar to a tripod or monopod, but with two legs. It provides significant stability along two axes of motion .-Firearms:...

 and bolt resulted in the MG 1A3.

Simultaneously, wartime 7.9mm MG 42 machine guns that remained in service were converted to chamber the standard 7.62x51 mm NATO round and designated MG 2.

In 1968, the MG3 was introduced and entered production. Compared to the MG1A3, the MG3 features an improved feeding mechanism with a belt retaining pawl to hold the belt up to the gun when the top cover plate is lifted, an added anti-aircraft sight and a new ammunition box. MG3s were produced for Germany and for export customers by Rheinmetall
Rheinmetall
Rheinmetall AG is a German automotive and defence company with factories in Düsseldorf, Kassel and Unterlüß. The company has a long tradition of making guns and artillery pieces...

 until 1979. Some additional production of the MG3 in Germany was carried out by Heckler & Koch
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...

. The MG3 and its variants all share a high level of parts interchangeability with the original MG 42.

Operating mechanism

The MG3 is an automatic, air-cooled, belt-fed
Belt (firearm)
A belt or ammunition belt is a device used to retain and feed cartridges into a firearm. Belts and the associated feed systems are typically employed to feed machine guns or other automatic weapons...

 short recoil
Recoil operation
Recoil operation is an operating mechanism used in locked-breech, autoloading firearms. As the name implies, these actions use the force of recoil to provide energy to cycle the action...

-operated firearm. It features a roller locked bolt mechanism that consists of the bolt head, a pair of rollers, the striker sleeve, bolt body and return spring. The bolt is locked securely by a wedge-shaped striker sleeve, which forces two cylindrical rollers contained in the bolt head outward, and into corresponding recesses in the extension of the breech of the barrel. On firing, both the barrel and barrel extension recoil to the rear. The resulting impact (much like a Newton's cradle
Newton's cradle
Newton's cradle, named after Sir Isaac Newton, is a device that demonstrates conservation of momentum and energy via a series of swinging spheres. When one on the end is lifted and released, the resulting force travels through the line and pushes the last one upward...

) moves the carrier to the rear withdrawing the wedge and both rollers as they are cammed inward and out of their sockets by fixed cams, unlocking the bolt head. The bolt carrier and bolt then continue to the rear together guided by fixed guides while the barrel and barrel extension return to battery. Upon return of the bolt forward, the impact of the rollers against the camming surfaces on the breech carry the rollers from their seats, and, together with the surfaces on the striker sleeve, force the rollers outward, locking the bolt head into the barrel extension and ensuring a complete lock. The bolt also houses a spring-loaded casing extractor and ejector. Ejection is carried out when the ejector strikes the buffer head, sending a push forward through the ejector bar, which hits the ejector pin. This pin pushes the top of the base of the cartridge, which is still held by the extractor at the base, causing the empty casing to rotate and eject downward through the ejection chute.

Features

The machine gun has an automatic-only trigger mechanism and a cross-bolt safety in the form of a button that is operated by the shooting hand (in its "safe" position the bolt release is disabled). The weapon fires from an open bolt
Open bolt
A semi or full automatic firearm is said to fire from an open bolt if, when ready to fire, the bolt and working parts are held to the rear. When the trigger is pulled the bolt goes forward, feeding a round from the magazine into the chamber and firing it...

. The cyclic rate can be altered by installing different bolts and recoil springs.

The MG3 feeds from the left side through a feed block using metal, 50-round continuous-link DM1 ammunition belts (which can be combined by cartridge) or disintegrating-link M13 or DM6 belts. In the light machine gun
Light machine gun
A light machine gun is a machine gun designed to be employed by an individual soldier, with or without an assistant, as an infantry support weapon. Light machine guns are often used as squad automatic weapons.-Characteristics:...

 role, the MG3 is deployed with a 100-round belt fitted inside a synthetic ammunition drum developed by Heckler & Koch
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...

 that is latched on to the left side of the receiver. The rear wall of the drum is transparent and serves as a visual indicator for the amount of ammunition available. The feed system operates through a feed arm that is housed in the feed cover. Two feed pawls are linked to the front end of the arm by an intermediate link and move in opposite directions, moving the belt in two stages as the bolt moves back and forward during firing.

Barrel

The MG3 has a quick-change, chrome-lined barrel with 4 right-hand grooves and a rifling twist rate of 1 in 305 mm (1:12 in). Alternatively MG3 barrels can also have polygonal rifling
Polygonal rifling
Polygonal rifling is a type of gun barrel rifling where the traditional lands and grooves are replaced by "hills and valleys" in a rounded polygonal pattern, usually a hexagon or octagon....

. The barrel is integrated with the barrel breech. The barrel should be changed frequently during sustained firing. The gun is cocked and the barrel catch on the right of the barrel shroud is swung forward. The breech end of the hot barrel swings out and can be removed by elevating or twisting the gun. A fresh barrel is then inserted through the barrel catch and the
muzzle bearing. When the catch is rotated back the barrel is locked and the machine gun can resume firing. Both the receiver housing and ventilated barrel casing are made from pressed sheet steel. A muzzle device is mounted at the end of the barrel and it acts as a 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...

, muzzle brake
Muzzle brake
Muzzle brakes and recoil compensators are devices that are fitted to the muzzle of a firearm or cannon to redirect propellant gases with the effect of countering both recoil of the gun and unwanted rising of the barrel during rapid fire...

 and recoil booster.

The machine gun is equipped with a synthetic polymer
Polymer
A polymer is a large molecule composed of repeating structural units. These subunits are typically connected by covalent chemical bonds...

 stock, a folding bipod and open-type 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 (sliding rear U-notch on a ramp with range settings from 200 to 1,200 m). A flip-up anti-aircraft sight is also provided.

In a stationary, heavy machine gun role the MG3 is mounted on a buffered tripod called a Feldlafette and outfitted with a periscope sight that can be used to engage indirect targets.

Variants

  • MG 1: Rheinmetall variant of the MG 42, most notably rechambered to fire 7.62x51 mm NATO.
  • MG 1A1 (MG 42/58): As MG 1, but with sights properly calibrated for the new round. Sights refitted to existing MG 1s.
  • MG 1A2 (MG 42/59): MG 1A1 variant; product improved with longer ejection port, heavy bolt and friction ring buffer.
  • MG 1A3: MG 1A2 variant; product improvement of all major components.
  • MG 1A4: MG 1 variant; for fixed mount armor use.
  • MG 1A5: MG 1A3 variant; MG1A3s converted to MG1A4 standard.
  • MG 2: Designation for all wartime MG 42s rechambered to 7.62x51 mm NATO.
  • MG 3: MG 1A3 variant; product improved with AA rear sight.
  • MG 3E: MG 3 variant; reduced weight model (roughly 1.3 kg lighter), entered into late 1970s NATO small arms trials.
  • MG 3A1: MG 3 variant; for fixed mount armor use.

Deployment

The MG3 is still used as the standard secondary weapon of most modern German armoured fighting vehicle
Armoured fighting vehicle
An armoured fighting vehicle is a combat vehicle, protected by strong armour and armed with weapons. AFVs can be wheeled or tracked....

 designs (e.g. Leopard 2
Leopard 2
The Leopard 2 is a main battle tank developed by Krauss-Maffei in the early 1970s for the West German Army. The tank first entered service in 1979 and succeeded the earlier Leopard 1 as the main battle tank of the German Army. Various versions have served in the armed forces of Germany and twelve...

, PzH 2000
PzH 2000
The Panzerhaubitze 2000 , abbreviated PzH 2000, is a German 155 mm self-propelled howitzer developed by Krauss-Maffei Wegmann and Rheinmetall for the German Army. The PzH 2000 is one of the most powerful conventional artillery systems currently deployed...

, Marder
Marder (IFV)
The Marder is a German infantry fighting vehicle operated by the German Army as the main weapon of the Panzergrenadiere from the 1970s through the present day. Developed as part of the rebuilding of Germany's armoured fighting vehicle industry, the Marder has proven to be a successful and solid...

), as a primary weapon on light/non-armored vehicles (e.g. LKW 2to, MAN gl-trucks, ATF Dingo
ATF Dingo
The ATF Dingo is a German heavily armored military infantry mobility vehicle based on a Unimog chassis with a V-hull design, produced by the company Krauss-Maffei Wegmann . It is designed to withstand land mines, rifle fire, artillery fragments and NBC-threats. ATF stands for...

) and as an infantry weapon on light bipods as well as different tripods. However, the German Armed Forces will phase out the MG 3 in 2012, they introduced the HK121 in 2011.

Users

The MG3 was adopted in the 1960's and has been used as the primary heavy assault gun since then.: The MG3 was used between 1976 and 2007 as an anti-aircraft weapon on the Australian Army
Australian Army
The Australian Army is Australia's military land force. It is part of the Australian Defence Force along with the Royal Australian Navy and the Royal Australian Air Force. While the Chief of Defence commands the Australian Defence Force , the Army is commanded by the Chief of Army...

's Leopard AS1 MBT
Main battle tank
A main battle tank , also known as a battle tank or universal tank, is a tank that fills the heavy direct fire role of many modern armies. They were originally conceived to replace the light, medium, heavy and super-heavy tanks. Development was spurred onwards in the Cold War with the development...

.: Uses the MG 74 which is a MG 42/59 variant licensed from Beretta and manufactured by Steyr Mannlicher
Steyr Mannlicher
Steyr Mannlicher is a firearms manufacturer based in the city of Steyr, Austria. Originally a part of the Steyr-Daimler-Puch manufacturing conglomerate, it became independent when the conglomerate was broken in 1990.-History:...

. The MG 74's cyclic rate of fire is 850 rounds per minute.: Used by the Bangladesh Rifles
Bangladesh Rifles
Border Guard Bangladesh is the oldest uniformed force in Bangladesh. It is a paramilitary force under the Ministry of Home Affairs of Bangladesh...

 border guards.: Uses the MG3 and the MG3 A1 with the Leopard 1A5 BR: Only used on 20 Leopard 2A6M CAN
Leopard 2
The Leopard 2 is a main battle tank developed by Krauss-Maffei in the early 1970s for the West German Army. The tank first entered service in 1979 and succeeded the earlier Leopard 1 as the main battle tank of the German Army. Various versions have served in the armed forces of Germany and twelve...

 tanks acquired from Germany. Leopard 2s acquired from other sources will continue to use the FN MAG
FN MAG
The FN MAG is a Belgian 7.62 mm general-purpose machine gun, designed in the early 1950s at Fabrique Nationale by Ernest Vervier. It has been used by more than 80 countries, and it has been made under licence in countries such as Argentina, Egypt, India, Singapore, the United Kingdom and the...

.: MG 42/59 designated M/62 in Danish service.: As the 7.62 KK MG 3. Used with the Leopard 2
Leopard 2
The Leopard 2 is a main battle tank developed by Krauss-Maffei in the early 1970s for the West German Army. The tank first entered service in 1979 and succeeded the earlier Leopard 1 as the main battle tank of the German Army. Various versions have served in the armed forces of Germany and twelve...

 tanks and NH90 helicopters.: Used by the Bundeswehr. A replacement is planned from 2011 onwards.: License production by 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...

 or EAS (formerly Hellenic Arms Industry; Elliniki Biomihania Oplon - EBO).: License production by 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...

 as the MGA3.: License production of the MG 42/59 by Beretta
Beretta
Fabbrica d'Armi Pietro Beretta is an Italian firearms manufacturer. Their firearms are used worldwide for a variety of civilian, law enforcement, and military purposes. It is also known for manufacturing shooting clothes and accessories. Beretta is the oldest active firearms manufacturer in the...

 with parts made by Whitehead Motofides and Luigi Franchi; while largely replaced in squad support weapon role by the Belgian
Belgium
Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

 FN Minimi
FN Minimi
The Minimi is a Belgian 5.56mm light machine gun developed by Fabrique Nationale in Herstal by Ernest Vervier. First introduced in 1974, it has entered service with the armed forces of over thirty countries...

, it still sees widespread mounted use on ground-based vehicles and helicopters. Prior to the procurement of the Minimi, the Stabilimento Militare Armi Leggere (SMAL) at Terni
Terni
Terni is a city in southern Umbria, central Italy, capital of the province of Terni, located in the plain of the Nera river. It is 104 km N of Rome, 36 km NW of Rieti, and 29 km S of Spoleto.-History:...

 has developed a kit to adapt the Italian Army's existing MG 42/59 machine guns to accommodate 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...

 ammunition. The kit comprises a new barrel, bolt head, feed opening and cover, recoil-enhancing element and a lighter bolt. The weight of the modified 5.56 mm MG 42/59 machine gun remains unchanged from the original version.: Lithuanian Armed Forces.: License produced by SEDENA in Mexico.: License production 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...

 in Wah Cantt
Wah Cantt
Wah Cantonment is a military city located in the Punjab province of Pakistan, to the north west of Rawalpindi/Islamabad.-History:...

.: Made under license.: Made 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 Karar.: Made by MKEK in Kırıkkale
Kirikkale Province
Kırıkkale Province is a province of Turkey. It is located on the crossroads of major highways east of Ankara leading east to the Black Sea region. With its rapid population growth it has become an industrial center. The provincial capital is Kırıkkale....

 under license since 1974 for the Turkish Armed Forces
Turkish Armed Forces
The Turkish Armed Forces are the military forces of the Republic of Turkey. They consist of the Army, the Navy , and the Air Force...

 and Turkish Gendarmerie
Turkish Gendarmerie
The Turkish Gendarmerie is a branch of the Turkish Armed Forces and it is responsible for the maintenance of the public order in areas that fall outside the jurisdiction of police forces , as well as assuring internal security and general border control along with carrying out other specific...

.

See also

  • General-purpose machine gun
  • Heckler & Koch HK121
    Heckler & Koch HK121
    The HK121 is a general-purpose machine gun manufactured by Heckler & Koch. The weapon is intended as a replacement for the well proven Rheinmetall MG 3. This weapon closely resembles the Heckler & Koch MG4.-External links:*...

  • MG51
    MG51
    The 7.5 mm Maschinengewehr 1951 or Mg 51 is a general-purpose machine gun manufactured by W+F of Switzerland. The weapon was introduced into Swiss service when the Swiss Army initiated a competition for a new service machine gun to replace the MG 11 heavy machine gun and the LMG 25 light...

     machine gun.
  • SIG 710-3, Swiss derivative of MG 42.

External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK