The KAK Flash Can Flash Hider is designed to direct muzzle gases and the muzzle flash forward. Threaded 0.578"-28 for 45 ACP or similar weapons. Black Military Type Hard Anodizing. This device is not designed to reduce recoil, muzzle rise, or flash signature. This device is designed to direct gasses and noise forward away from the shooter and enhance the weapons appearance. The muzzle device does not use a crush washer and should be torqued directly against the barrel shoulder. Features6061 Aluminum ConstructionBlack Military Type Hard AnodizingDirects Gas Forward3/4" Wrench Flats