Direct Gas Impingement Semi Automatic Rifle - 5.56 NATO (accepts 5.56 NATO and .223 Remington) - 16.1 Chrome Lined M4 Profile Barrel - 1:7 Twist Rate - Threaded 1/2 x 28 TPI - Birdcage A2 Style Flash Hider - Forged 7075 T6 Aluminum Upper/Lower Receivers - Flat Top Upper Receiver - M4 Feed Ramps - Reversible Selector Switch - Carbine Length Gas System - Polymer Hand Guard - A2 Front Sight - A2 pistol Grip - Magpul Flip Up Rear - 30 Round Magazine (Magpul PMAG) - Accepts all standard pattern M4/AR-15 Magazines - Standard Mil-Spec Trigger - 4 Position Collapsible Stock Carbine Stock - Front Barrel Lug - Ejection Port Cover - Made in the USA - Overall Length 32 Collapsed / 35 Extended - Overall Weight 6.95lbs - Hard Coat Anodized Finish - Matte Black Finish