Lead Star put in a ton of engineering, prototyping, and testing work when they were designing their Ravage Muzzle Break. Lead Star wanted to develop and refine their design until they had the most effective PCC muzzle brake available. This muzzle brake effectively utilizes the small amount of gas that a 9mm round produces to control muzzle rise. Features:Enhanced design compensator dramatically reduces recoilUnique geometry minimizes muzzle rise for faster follow up shotsPre-drilled on the bottom for pinning muzzle brake to barrelPrecision CNC 7075-T6 aluminumDesigned to replace AR-9 muzzle devices with 1/2"-28 threadsWeighs only .9 oz.Type III Class 2 hard coat anodizedCrush washer included