Comstock Armory Compact Muzzle Brake 9mm Luger 1/2x28 Black Nitride Black. 900"-24 adapters like the Comstock LPA Q Plan-B and Rearden Atlas. The MBC greatly reduces recoil and blast baffle wear and unlike most brakes out there it does not need to be timed with shims. Specifications for Comstock Armory Compact Muzzle Brake: Manufacturer: Comstock Armory Color: Black Finish: Black Nitride Fabric/Material: Stainless Steel Gun Make: Universal Length: 1.6 in Features of Comstock Armory Compact Muzzle Brake Allows for the quick attachment and removal of suppressors Significantly reduces blast baffle wear; acts as a sacrificial baffle High strength 17-4 PH stainless steel Durable black nitride finish Effectively reduces recoil Rotationally symmetric and does not need to be timed with shims Package Contents: Comstock Armory Compact Muzzle Brake Comstock Armory MBC-12-9: Compact Muzzle Brake 9mm Luger 1/2x28 Black Nitride Black