Diamondback Firearms DB15 300BLK, Semi-automatic Rifle, 300 Blackout, 16" Barrel, 1:8 Twist, Black Finish, 12" KeyMod Rail, MOE Grip, MOE Carbine Stock, 30 Rounds, 1 Magazine DB1719B001 • Action: Semi-Automatic • Capacity: 30+1 • Finish: Black Anodized Hardcoat • Sights: No Sights • Barrel length: 16 4140 Chrome-Moly/ Free Floating/ Melonite • Overall length: 32.5 Collapsed - 36.25 Expanded • Rifling 1-8 RH/ Forward Assit/ Dust Cover12" Keymod Rail MOE Grip | A2 Flash Hider • Action: Semi-Auto • Capacity: 30 + 1 • Finish: Black Anodize • Sights: No Sights • Barrel length: 16" • Overall length: 32" to 36" • 15in Free-Float MLOK Rail/ Ambi Bolt Release