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