7075-T6 Aluminum Forging – 416R 20 Barrel 1:8 twist Nitride Finish – Gas Impingement System – B5 Bravo Stock – B5 Type 22 P-Grip – Material Lowers and Uppers are CNC Machined from 7075-T6 Aluminum Forging – Barrel Length 20in – Twist rate 1:8 RH – Rail System M-Lok – Rail Size 15in – Diameter of the Handrail 1.5in – Threading 5/8×24 – Magazine Magpul 10rd – Stock/Grip B5 System Furniture – Buffer weight 4.9oz Buffer – Weight 7.29 lb – Length 31.5 Stock Not Extended – Weapon system Gas Impingement System – Color Cerakote Finish Armor Black – Platform AR10 – Caliber 308 – Made In America? Yes