Designed with Phantom styling in mind but works as a muzzle brake and compensator. This 5 port design has no downward facing port which helps eliminate dust problems when shooting in the prone position. The 5M2 features a “no snag” design that allows the user to navigate rough terrain without interference, while the 5M1 maintains the agressive front end for hand-to-hand situations. Threaded 1/2"-28. Includes crush washer.