One of the world's most effective flash hiders, the proprietary features eliminate muzzle flash, even on CQB-length barrels. The Blackout is inherently stronger and more impact resistant than four prong designs, while not being subject to the rapid erosion of closed-ended units. A high strength corrosion-resistant aerospace alloy, and ultra-hard nitride finish provide the highest level of durability. It is military tested and selected. This is the non-mount version for use without a silencer, in 9mm threaded 1/2x28 tpi.