The Comstock Armory 9mm Flash Hider is compatible with common .900"-24 adapters like the Comstock LPA, Q Plan-B, and Rearden Atlas. Unlike most flash hiders out there, the FHL is designed to redirect expanding gasses outwards which significantly reduces blast baffle wear. FeaturesAllows for the quick attachment and removal of suppressorsDirects expanding gasses outwards to reduce blast baffle wearHigh strength 17-4 PH stainless steelDurable black nitride finish3/4" wrench flats for easy installation and removalEffectively hides muzzle flashRotationally symmetric and does not need to be timed with shimsPredrilled for easy pinning and welding on 14.5" barrels