Advanced Armament 64177 Blackout Non-Mount 5.56x45mm NATO 1/2"-28 tpi 2.13" Black Nitride Aluminum

The Blackout flash suppressor is the most efficient design available. It has been military tested and selected. 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 SCARmor finish provide the highest level of durability. This non-silencer mounting design is for barrels with 5/8" (.625") of exposed muzzle thread. The 1/2-28 flash hider adds 1.60" to the OAL of the barrel, making 14.5" barrels 16.1" when the flash hider is pinned and welded.