Two Rounds fired Through it to check function cosmetic wear on pic rail due to slippage in my vice when installing. Build list below: SLR B36 receiver set with SLR Ion Hand guard Cerekote RAL8000. BA 8.6 BLK 12.5" DRP 1/3 Twist Premium Series Barrel Lantac Enhanced 308 BCG PRI FDE 308 Gas Buster Charging Handle Geissele 3 Gun Trigger KAK Flat Recoil Spring and Buffer with Buffer Tube Pistol length SLR Gas Tube and SLR gas block Ambi Saftey Selector Emissary Pistol Grip SiCo 8.6 ASR Muzzle Brake Only trade would be for a MCX Rattler in 300 BO