KAC-Knight's Armament Long FF RAS, MK12 Mod 1
The Allen Engineering single chamber muzzle brake is used in conjunction with their suppressors and mounts. It effectively reduces muzzle rise and flash and lessens the felt recoil. Complete kit including barrel fitting, thread protector, and shim kit.
.22 Cal. (5.56mm/.223) 1/2-28 tpi .866" O.D.
Shim kit (you can still use a crush washer if you prefer)
Long Collar w/Set Screw