Features: Designed to fit Lone Wolf Threaded Glock Barrels Precision CNC Machined Black oxide finish 9mm model features A 1/2-28 TPI and weighs 1.2 oz OAL is 1.304" Will not fit Lone Wolf 40-9 threaded conversion barrels or 10mm barrels Benefits: Simple installation, just thread on Assists in the reduction of muzzle flash Flash hiders help preserve night vision Also can serve as a thread protector when other devices are not installed Mfg: Lone Wolf Dist.