Feed ramps for increased feeding reliability on barrel and upper
Laser etched T-Marked upper receiver
4150CMV .300 Blackout High End Barrel Machined In House
Stress relieved for superior accuracy
Chambered in .300 Blackout
10.5" HBAR Profile barrel with M4 Extension
.750" barrel diameter at gas block
5/8x24 threaded muzzle/barrel
Low profile gas block
Barrel dimpled to secure gas block
Pistol length gas system
A2 flash hider
Tactical Quad Rail 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. A 20% restocking fee will apply if you cancel anytime after ordering or 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.