Caliber: .308 WIN - Finish: Black Anodized Hardcoat - Barrel: 13.5 .308 4150 Black Nitride - Twist Rate: 1:10 - Gas System: Mid-Length Gas System - Bolt Carrier Group: Azimuth Black Nitride AR 10 Carrier w/ Multi-Cal Bolt DPMS Style Barrel Extension High Pressure Firing Pin - Lower Receiver: Forged 7075 T6 Aluminum - Upper Receiver: Flattop Forged 7075 T6 Aluminum T-Marked - Handguard: 13” M-LOK Rail - Selector: Ambidextrous Safety Selector - Grip: Hexmag Grip - Stabilizer: Shockwave Blade Stabilizer - Mag: 20 Round Metal Mag - Weight: 7lbs 11oz. - Overall Length: 31.25” - Muzzle Device: DB Muzzle Brake threaded 5/8 x 24