Knight's Armament Company (KAC, also Knight's Manufacturing Company) is an American firearm

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...

s and firearms parts manufacturer.

It is owned by C. Reed Knight and based in Titusville, Florida

Titusville, Florida

Titusville is a city in Brevard County, Florida in the United States. It is the county seat of Brevard County. Nicknamed Space City, USA, Titusville is on the Indian River, west of Merritt Island and the Kennedy Space Center and south-southwest of the Canaveral National Seashore...

. KAC is best known for producing the Rail Interface System (RIS) and the Rail Adapter System (RAS) grips for military firearms. The United States military as well as armed forces and police around the world use KAC RIS/RAS conversions for many popular firearms, including the American M16

M16 rifle

The M16 is the United States military designation for the AR-15 rifle adapted for both semi-automatic and full-automatic fire. Colt purchased the rights to the AR-15 from ArmaLite, and currently uses that designation only for semi-automatic versions of the rifle. The M16 fires the 5.56×45mm NATO...

/M4

M4 carbine

The M4 carbine is a family of firearms tracing its lineage back to earlier carbine versions of the M16, all based on the original AR-15 designed by Eugene Stoner and made by ArmaLite. It is a shorter and lighter variant of the M16A2 assault rifle, with 80% parts commonality.It is a gas-operated,...

 rifles and the popular Heckler & Koch MP5

Heckler & Koch MP5

The Heckler & Koch MP5 is a 9mm submachine gun of German design, developed in the 1960s by a team of engineers from the German small arms manufacturer Heckler & Koch GmbH of Oberndorf am Neckar....

 series 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...

s. The RIS/RAS system allows for the mounting of accessories to firearms without additional tools or modifications, and is used, alongside a KAC suppressor and forward grip on the Special Operations Peculiar MODification (SOPMOD

SOPMOD

The Special Operations Peculiar MODification kit is an accessory system for the M4A1 carbine and FN SCAR Mk 16/17 used by USSOCOM...

) M4 carbine package in use by United States Special Operations Command

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...

 (USSOCOM). These can include tactical flashlight

Flashlight

A flashlight is a hand-held electric-powered light source. Usually the light source is a small incandescent lightbulb or light-emitting diode...

s, 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...

 targeting units, 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:...

s, and vertical foregrips. KAC has multiple iterations of the RIS/RAS system, including the basic delta ring mounted RIS/RAS, the FF (Free Float) RAS, and the URX (Upper Receiver Extension) in multiple lengths and profiles. In addition, KAC is known for producing sound suppressors

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....

 for the 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...

 Mark 23 SOCOM

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...

 pistol. KAC also produces a complete line of clip-on night vision and thermal weapon weapon sights, including the Universal Night Sight

AN/PVS-22

The AN/PVS-22 or Universal Night Sight is a Picatinny rail mounted in-line night sight designed and manufactured by FLIR Systems and issued with the existing telescopic sight or red dot sight. It can be added to any weapon that uses a Picatinny rail and has an existing scope, simply mounting in...

. Furthermore, KAC produces numerous mounts for optics and grenade launchers, as well as backup iron sights.

Finally, Knight's Armament produces a line of firearms including the semi-automatic SR-15 line of rifles, the fully automatic SR-16 carbine, the semi-automatic SR-25

SR-25

The SR-25 is a semi-automatic sniper rifle designed by Eugene Stoner and manufactured by Knight's Armament Company. The SR-25 uses a rotating bolt and a direct impingement gas system. It is loosely based on Stoner's AR-10, rebuilt in its original 7.62×51mm NATO caliber...

 sniper rifle, the SR-25 based Mark 11 Mod 0 Sniper Weapon System and the M110 Semi-Automatic Sniper System. The SR-47

SR-47

The SR-47 is a modern assault rifle based on the AR-15 family of rifles created by Knight's Armament Company for USSOCOM. Unlike the majority of guns based around ArmaLite design, the SR-47 is essentially an AR-15 that fires the Soviet 7.62×39mm round from AK-47 magazines, which explains the "47"...

 and SR-50, chambered for 7.62x39mm and .50 BMG

.50 BMG

The .50 Browning Machine Gun or 12.7×99mm NATO is a cartridge developed for the Browning .50 caliber machine gun in the late 1910s. Entering service officially in 1921, the round is based on a greatly scaled-up .30-06 cartridge...

, respectively, are discontinued. KAC also produces the Stoner LMG

Stoner LMG

The Stoner LMG is a light machine gun system developed by Eugene Stoner and manufactured by Knight's Armament Company . It is also known as the KAC Stoner 96 LMG to differentiate it from the earlier ArmaLite Stoner 63 LMG and Ares Stoner 86 LMG it is derived from.The Stoner LMG is billed by KAC as...

 in limited quantities. As their apparently most original design, KAC is producing the Knight's Armament Company PDW

Knight's Armament Company PDW

The Knight's Armament Company 6x35mm PDW is an experimental personal defense weapon designed by KAC, firing a new 6mm cartridge optimized for short barrel weapons....

. Recently, KAC has released the SR15/SR16 E3 line of rifles.

Knight's Manufacturing Company (KMC) is the division of KAC responsible for products aimed at the civilian market.