Gas Piston System Semi Automatic – 7.62 NATO (.308 Winchester) – 20 Cold Hammer Forged CrMov Chrome Lined Barrel – 1:12 Twist Rate – 4 Groove Right Hand – 4 Position Gas Regulator – Closed Rotating Bolt – Short Stroke Gas Piston – 10 Round Magazine – DPMS LR-308/SR-25 Pattern Magazine – Flash hiding Muzzle Device – Reinforced Polymer Bullpup Configuration – Increased Ergonomics Features – Can Lock the Charging handle without use of Bolt Catch – Maintains M4 Type Ambidextrous Magazine Release System – 45 Degree Ambidextrous Safety – Ejection Side/Charging handle Side Can Be Reversed – Ambidextrous Safety Lever Magazine Release and Bolt Catch – M-LOK Forend Capability – High Strength Impact Modified Polymer – Overall Length 29.75 – Overall Weight 10lbs – Black