Feed ramps for increased feeding reliability on barrel and upper
Laser etched T-Marked upper receiver
416r Stainless Steel M4 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
Carbine length gas system
A2 flash hider
10" SDX 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. No waiting weeks for parts to come in or uppers to be built to, our website shows real time inventory of what is ready to go out the door to you immediately!
You are responsible for knowing your state laws regarding barrel lengths, pistol, Short barreled rife restrictions. 20% restocking fees if you 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.