Caliber: 5.56x45mm NATO – Color: Black – Barrel: 20 4150 CMV Chrome Lined 1:7 – Sights: A1 – Upper Receiver: A1 Forged 7075 T6 Aluminum – Lower Receiver: Forged 7075 T6 Aluminum – Bolt Carrier Group: M16 – Gas System: Rifle-Length A1 Pinned Gas Block – Handguard: A1 Polymer w/ Integral Heat Shield – Stock: A2 Fixed – Trigger: Mil-Spec – Muzzle Device: A1 3 Prong Flash Hider – Trigger Guard: Mil-Spec – Grip: A1 – Magazines: (1) GI Aluminum 30-Round – Weight: 7 lbs – Length: 39.5