Features: Platform: FM-15 Gen 2 Caliber: .223 Wylde Op. System: Direct Impingement Barrel Length: 16" Barrel Contour: Lightweight Barrel Material: 41v50 Barrel Finish: Black Nitride Barrel Twist: 1:8 Muzzle Device: A2 Flash Hider Muzzle Thread: 1/2 X 28 Gas System: Intermediate Gas Block: 0.625" Non-adjustable Weight: 6.0 Lbs. Length: 34" (25.75" Folded) Hand Guard: 15.5" Mlok Free Float Charging Handle: 4-position Front Charge Safety Selector: FM Products Ambi. Receiver Material: Billet Aircraft Aluminum Receiver Finish: Type III Hard Black Anno. Receiver Extension: Gen 2 AR Folder Stock / Brace: Thril Competition Stock Pistol Grip: Thril Rugged Tactical Trigger Guard: Integrated Trigger Type: USGI Mil-spec