Comstock Armory Full Size Flash Hider 9mm Luger 5/8x24 Black Nitride Black. 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. Specifications for Comstock Armory Full Size Flash Hider: Manufacturer: Comstock Armory Color: Black Caliber: 9mm Luger Finish: Black Nitride Fabric/Material: Stainless Steel Gun Make: Universal Outer Diameter: 0.9 in Features of Comstock Armory Full Size Flash Hider Allows for the quick attachment and removal of suppressors Directs expanding gasses outwards to reduce blast baffle wear High strength 17-4 PH stainless steel Durable black nitride finish Effectively hides muzzle flash Rotationally symmetric and does not need to be timed with shims Package Contents: Comstock Armory Full Size Flash Hider Comstock Armory FHL-58-9: Full Size Flash Hider 9mm Luger 5/8x24 Black Nitride Black