It's a surefire - SureFire Suppressors Socom 4-Prong Flash Hider

Got this for a shorty build I'm doing that I eventually plan on running suppressed. My preferred muzzle device is the Surefire Warcomp CTN, but without labyrinth seals, you'll have quite a bit of gas coming back at ya...4 tine should mitigate that! Surefire is bombproof, what else can ya say! Love the deals at Optics Planet and your gear always comes quick!!