Caliber: .308 Winchester. Barrel: Diamondback Barrels 308 Pistol, Mid-Length, 13.5, Medium, 4150 CrMov, Black Nitride. Barrel Twist Rate: 1:10 RH. Gas System: Mid-Length. BCG: Shot-Peened, Magnetic Particle Inspected Mil Spec 8620 Carrier. Upper Receiver: A3 Flattop Forged 7075 T-6 Aluminum. Lower Receiver: Forged 7075 T-6 Aluminum. (Diamondback Carbon). Handguard: 13 M-LOK Rail. Grip: Moe-K Grip. Stock: Buffer Tube Foam Pad. Magazine: Gen M3 PMAG 20 Rounds. Sights: No Sights. Muzzle Device: A2 Flash Hider (5/8 x 24). Trigger: Standard Trigger. Weight: 5.1 LBS. Length: 23