Hardened Arms is pleased to announce our 18" 4150CMV barrels produced in house that have been air gauged and bore scoped to ensure top quality accuracy. The free float upper lends itself to an increase in accuracy by not putting pressure on the barrel and the mid-length gas system softens the recoil allowing faster follow up shots. Our uppers are built from the ground up to be fast, accurate and reliable.
18" 5.56mm AR-15 Upper Receiver Assembly:
Hardened Arms M4 Feed Ramp Flat Top Receiver
Mil-spec 7075 Upper 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 Mil-Spec-B Steel Melonited High End Barrel
Chambered in 5.56mm (will also shoot .223)
18" Socom Profile barrel with M4 Extension
1/9 Barrel Twist
.750" 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 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. A 20% restocking fee will apply if you cancel any time after you order or if you cannot 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.