Hardened Arms M4 Feed Ramp Flat Top Receiver Black anodized mil-spec finished upper receiver Feed ramps for increased feeding reliability on barrel and upper Laser etched T-Marked upper receiver 4150CMV Stress Relieved 5.56 Barrel Machined In House Black Melonite Finish 1/9 Barrel Twist Chambered in 5.56 NATO (will also fire .223 ammo) 16" M4 Profile barrel with M4 Extension .750" diameter at gas block 1/2x28 threaded muzzle/barrel Low profile gas block Barrel dimpled to secure gas block Carbine length gas system A2 flash hider Tactical Quad Rail free float 10" hand guard WITHOUT end cap
Fits any mil-spec AR15 lower receiver. Hardened Arms uppers are high end, accurate, head spaced, inspected and test fired prior to shipping. They are built using stringent specs, top quality parts and procedures to ensure maximum reliability and performance. You are responsible for knowing your state laws regarding barrel lengths, pistol and short barreled rifle restrictions. 20% restocking fees if you cancel any time after you order or can not take delivery due to state restriction. Dealer programs are available on our website. Two year warranty against manufacturer defects. Finishes will wear with use, no warranties apply to finish wear.