The AR-STONER Spiral Fluted Muzzle Brake assists with directing muzzle blast, gases, and concussion away from the shooter. Its design improves the shooting experience by minimizing side blast interference and does not create back pressure which makes it desirable for pistol calibers, firearms with shorter barrels, and firearms not requiring an increase in dwell time. Made of solid steel with a Nitride finish, it can sustain a high volume of fire while maintaining performance. A crush washer is included. FeaturesCrush washer includedDoes not reduce flashDoes not reduce recoilDirects blast downrange