Comstock Armory Facemount Compact Muzzle Brake 9mm Luger 5/8x24 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. Facemount muzzle devices are designed for barrels that lack a proper shoulder like the PSA AKV Tavor/X95 VZ 61 some SCAR 16s and others. Specifications for Comstock Armory Facemount Compact Muzzle Brake: Manufacturer: Comstock Armory Color: Black Caliber: 9mm Luger Finish: Black Nitride Fabric/Material: Stainless Steel Gun Make: Universal Length: 1.6 in Features of Comstock Armory Facemount 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 Facemount Compact Muzzle Brake Comstock Armory MBC-58-9-FM: Facemount Compact Muzzle Brake 9mm Luger 5/8x24 Black Nitride Black