Faxon Firearms Sentinel, Semi-automatic Rifle, AR, 8.6 Blackout, 16" Barrel, 3 Port Muzzle Break, Carbine-Length Gas System, Anodized Finish, Black, G3 Aluminum Streamline M-LOK Handguard, B5 Precision Collapsible Stock, B5 Pistol Grip, 1 Magazine, 20 Rounds FX8616