ZEROED Muzzle Brake 5.56mm The CMMG ZEROED Muzzle Brake features angled ports that provides excellent recoil control and minimizes muzzle rise. This allows for faster return to target for more accurate follow-up shots and creates a more enjoyable shooting experience. Designed for 5.56mm and has 1/2×28 threads. Made from 4140 Steel with a Nitride finish, the ZEROED Muzzle Brake has the durability and attention to detail that all CMMG products are known for. Includes: Muzzle Brake 5.56mm | 1/2-28 Crush Washer Mfg: Cmmg