Claw Gear‘s modular firearms accessories products are designed to increase weapon performance and accuracy. Due to it‘s outstanding materials construction, this rugged and high quality made item will serve you in any situation.B&T Quick DetachAllows the operator to enhance the weapon system with B&T QD (Rotex-V) suppressors.Breacher SpikesThese sharp and hardened steel spikes allow the user to destroy barriers in CQB situations.Expansion ChamberThe construction guides the exhaust gases in optimal direction to reduce recoil and muzzle flip.Crush WasherMount the AR-15 SOF Compensator with the crush washer to ensure the correct alignment on the barrel.Closed BottomPrevents blown up dust and debris.Compatibility: All AR-15 and M16 variants in .223 or 5.56 mm caliber with a barrel thread of 1/2 x 28 TPI UNEF, for example: Hera Arms The 15th, Schmeisser AR15, DPMS AR-15, etc. Does not fit Oberland Arms OA-15Installation: Dismount existing muzzle devices and clean the thread surface. After applying a drop of oil on the thread, put the crush washer over the thread (the conical end facing towards muzzle). Screw the compensator clockwise on the barrel by hand until it fits snugly. Then use a 19 mm wrench to tighten the compensator until the Claw Gear logo faces upwards.