KAC Knight's Armament 556 Free Float Rifle RAS (MK12 Mod1) Rail

Knight's Armament Company


$ 354.20

KAC Knight's Armament 556 Free Float Rifle RAS (MK12 Mod1) Rail

Manufacture: Knight’s Armament Company

KM21318

This is the same rail used by the U.S. Military for their Mk12 Mod1 DSR rifles.

The KAC Free Float RAS (Rail Adapter System) features full length mil-spec M1913 Picatinny rails at the 12-, 3-, 6-, and 9 o’clock positions, making it compatible with any number of rail-mounted tactical accessories. The rail free floats the barrel, allowing for consistent barrel harmonics upon firing, and thus increased accuracy potential. Includes three KAC 11 Rib Rail Panels.

Rifle Requirements: This Free Float RAS requires that the rifle have a carbine or mid length gas system and a low profile gas block. Disassembly of the rifle’s gas system and removal of the factory barrel nut will be necessary. This forend uses a proprietary barrel nut that may be installed using a standard AR-15 armorer’s barrel nut wrench (sold separately). For AR-15/SR-15 based platforms only; not compatible with SR-25 variants. Installation instructions are included.

Related Products



N.S. Defense is your source for Knight’s Armament Company KAC! We are an owner operated firearms dealer located in southwest Florida. We are a proud dealer and certified M110 Sr25 armorer for Knights Armament Company KAC. N.S. Defense LLC was created to provide shooters of all professions and backgrounds with a source of quality firearms and reliable information. Please feel free to contact N.S. Defense with any questions or concerns. Thanks you!

Call or text Jake (941) 286-2005

Email: Gnackley@nsdefense.com

Port Charlotte, Florida

Contact for mailing address.


Get Connected

  • american express
  • apple pay
  • discover
  • master
  • visa
Copyright © 2018 N.S.Defense LLC | Powered by Shopify