Upper receiver is machined from solid 7075 billet aluminum
Black anodized mil-spec finished upper receiver
Feed ramps for increased feeding reliability on barrel and upper
Laser etched T-Marked upper receiver
416r Stainless Steel Socom Barrel
1/9 Barrel Twist
Chambered in 5.56mm (will also shoot .223 reliably)
.750" barrel diameter at gas block
1/2x28 threaded muzzle/barrel
Low profile gas block
Barrel dimpled to secure gas block
Mid length gas system
A2 flash hider
12" Quad Rail 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. A 20% restocking fee will apply if you cancel any time after 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.