The SilencerCo ASR Muzzle Brake sold by SPEKARMS LLC has a 3-port design. It is compatible with all ASR Direct threads and quick detachment mounts for the 5.56 or 2.23 caliber, allowing you to shoot suppressed on demand. Muzzle Brakes & Compensators offer extended muzzle recoil reduction with one-hand-off/on attachment and detachment, letting you swap easily out in the field without worry. The 3-port design of the Hybrid ASR Muzzle Brake largely reduces felt muzzle climb and recoil. Each ASR muzzle brake has a shim set and rocksett for easy installation.