You can find the Rugged Suppressors 3 Port Brake 5.56 1/2x28 here Fast $9.95 shipping! Orders over $200 ship for free!

The Rugged Suppressors 3 Port Brake features Rugged's Dual Taper Locking System which is compatible with the Radiant762, Surge762, Razor762 and Micro30 suppressors. The 3 Port Brake is designed for reducing recoil when shooting unsuppressed. The 3 Port Brake has a .30cal aperture, but the 1/2x28 variation can be permanently attached to 5.56 14.5" barrels in order to meet 16" requirements.

Caliber: .223/5.56
Threads: 1/2x28