Dead Air Pyro 2.0 Muzzle Brake Kit 45 Cal. w/ SD500 Booster & 45 Cal. Front Cap Muzzle brake for .45 caliber firearms;Includes SD500 Booster for use with tilting-barrel handguns;Ships with .45 caliber P-Series front cap;Front cap is interchangeable with other P-Series caps;Installs over Keymo muzzle devices;Converts to a fully functional brake quickly;Designed to reduce recoil and flatten shootingtable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 7600 Product Group Code: 7600P Inactive: No Prop65 Applies: Yes Prop65 Cancer Harm: Yes Prop65 Chemical: Lead