The Comstock Armory Full Size Muzzle Brake is compatible with common .900"-24 adapters like the Comstock LPA, Q Plan-B, and Rearden Atlas. The MBL greatly reduces recoil and blast baffle wear, and unlike most brakes out there, it does not need to be timed with shims. FeaturesAllows for the quick attachment and removal of suppressorsSignificantly reduces blast baffle wear; acts as a sacrificial baffleEffectively reduces recoilHigh strength 17-4 PH stainless steelDurable black nitride finish13/16" wrench flats for easy installation and removalRotationally symmetric and does not need to be timed with shims2" overall length (~1.36" added to muzzle)