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Knight's Armament Company
Type Private company
Industry Defense
Founded 1982
Headquarters Titusville, Florida, U.S.
Products Firearms, weapons, Firearm Accessories

Knight's Armament Company (KAC), also known as Knight's Manufacturing Company, is an American firearms and firearms parts manufacturer, best known for producing the Rail Interface System (RIS) and the Rail Adapter System (RAS) grips for firearms use. They currently produce a variety of firearms, specifically rifles based around the AR-15 platform. One of their best known rifles is the SR-25 semi-automatic sniper rifle.

KAC is owned by C. Reed Knight and is based in Titusville, Florida. Knight's Manufacturing Company (KMC) is the division of KAC responsible for products aimed at the civilian market.


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/M4 rifles and the popular Heckler & Koch MP5 series submachine guns. 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) M4 carbine package in use by United States Special Operations Command (USSOCOM).[1][2] These can include tactical flashlights, laser targeting units, bipods, 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 for the Heckler & Koch Mark 23 SOCOM pistol.[3] KAC also produces a complete line of clip-on night vision and thermal weapon weapon sights, including the Universal Night Sight.[4] Furthermore, KAC produces numerous mounts for optics and grenade launchers, as well as backup iron sights.

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 sniper rifle, the SR-25 based Mark 11 Mod 0 Sniper Weapon System and the M110 Semi-Automatic Sniper System.[5] The SR-47 and SR-50, chambered for 7.62x39mm and .50 BMG, respectively, are discontinued. KAC also produces the Stoner LMG in limited quantities. As their apparently most original design, KAC is producing the Knight's Armament Company PDW. Recently, KAC has released the SR15/SR16 E3 line of rifles.[6]


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