Rearden MFG R2 Rainbow PVD Flash Hider, 1/2-28, Black Rainbow PVD, 10085

Always use an alignment rod to ensure that the entire system is set up correctly. Make sure all surfaces are cleaned and the muzzle device has been torqued and Rockset to the barrel. Use on a Q can voids your warranty be warned. Torque the muzzle device to approximately 30 ft lbs.