The Pyro 2.0 Enhanced Muzzle Brake is a complete system featuring an SD500 booster and .45 caliber front cap for superior recoil reduction and muzzle control.Pyro 2.0 Enhanced Muzzle Brake SystemSD500 booster component included.45 caliber front cap for proper bore alignmentEnhanced design for improved performanceComplete system with all necessary componentsDesigned for serious shooters who demand precision and performance this muzzle brake system reduces felt recoil and muzzle rise for improved accuracy and faster follow-up shots.