KAC-Knight's Armament Carbine FF RAS, MK18

Knight's Armament
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Out of stock

Out of Stock

KAC-Knight's Armament Carbine FF RAS, MK18 (20208)

The KAC Carbine 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.


  • Total Length: 7 3/16"
  • Picatinny Rail Length: 6 3/16"
  • Weight: 13.9 oz.
  • Free Float: Yes
  • Material: Aluminum
  • Finish: Black Anodizing
  • P/N: 20208


Rifle Requirements: This Free Float RAS will work with guns with a carbine length gas system and standard A frame front sight. 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.