from Rugged Suppressors, the 2 port brake offers muzzle compensation as well as a muzzle attachment point for Rugged 5.56 caliber suppressors
This 5.56 muzzle brake is designed for reducing recoil when shooting unsuppressed on 5.56 platforms. The 2 Port Brake utilizes our Dual Taper Locking System, making it compatible with our Radiant762, Surge762, Razor762 and Micro30.
Additional Information: Muzzle Device Mounting Instructions