Rugged suppressors' 3 port brake featuring their dual taper locking system compatible with our radiant762 surge 7.62 razor 7.62 and micro30.This muzzle device is designed for reducing recoil when shooting unsuppressed.The 3 port brake has a.30 cal aperture.Finish: BlackModel: 3 Port BrakeThread Pattern: 1/2"-28 tpi