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