Features: Caliber: 5.56mm Capacity: 30 Rounds Action: Direct Impingement Barrel Length: 16" M4 Contour 4140 Chrome Moly A2 Flash Hider Twist: 1:9" Stock: Mil-Spec 6-Position Pistol Grip: A2 Handguard: 9" M-Lok Weight: 6.2 lbs Specifications: .223 Wylde Chamber 16" 4140 M4 Contour Steel Barrel 1:9 Twist 7075-T6 Forged Upper and Lower Receiver A2 Birdcage Flash Hider Carbine-length gas system M16 Nitride Bolt Carrier Group Single Stage Mil-Spec Trigger M4-style Polymer Handguard Mil-spec 6 position Stock Mil-spec A2 grip Rail-height gas block accommodates flip-up sight Weighs 6.2 lbs Includes 30rd PMAG