Dead Air Pyro 2.0 Muzzle Brake Kit .30 Cal. Pyro Muzzle Brake w/DA428KeyMo&Front Cap Designed for .30 caliber firearms;Converts KeyMo muzzle devices into an effective brake;Includes KeyMo adapter and Pyro vented shroud;HUB-compatible shroud works with Xeno adapters and devices;Ships with .30 caliber front cap, compatible with R-Series front caps;Mounts to Key Brake, Flash Hider, KeyMicro muzzle brakes, and KeyMicro flash hiders;3.1-inch overall lengthtable.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