Specifications: - Caliber 5.56 NATO (.223 REM) -16" Barrel with a 1:8 Twist Rate - Overal length: 32.5 - 36"  - A2 Style Handgaurd  - Salt Bath Nitrate MPI Bolt Carrier Group - A2 Birdcage Flash Hider 1/2 x 28    Features:  - Equipped with a Bushmaster 30 Round Aluminum Magazine -Trigger assmebly is mil spec -The gas system is carbine length -6 Position collapsible stock for ease of adjustment and precise fit -7075 Forged A4 Flat top, Optics Ready  - Salt Bath Nitrate Barrels    Proudly Made In U.S.A.