Diamondback Firearms DB15 Obsidian, Semi-automatic, AR Pistol, 300 Blackout, 10.5" Barrel, 1:8 Twist, Muzzle Brake, Anodized Finish, Flat Dark Earth, 9" Free Float M-LOK S Rail, Magpul MOE K2 Grip, SBA5 Pistol Brace, 30 Rounds, 1 Magazine DB1984B061