3 Port Muzzle Brake featuring Rugged Suppressors' Dual Taper Locking System compatible with all of their rifle and multi-caliber suppressors. This muzzle device is designed for reducing recoil when shooting unsuppressed. The 3 Port Brake has a .30 cal aperture but the 1/2×28 variation can be permanently attached to 5.56 14.5″ barrels in order to meet 16″ requirements.

*timing shims included