Looking to improve your range trips? Want the absolute most rigid and harmonically resistant barrel? A bull barrel delivers superb accuracy by increasing rigidity, decreasing harmonics and dramatically reducing felt recoil. These barrels are made in house on our state of the art CNC equipment, using only the highest quality chrome moly vanadium steel. Nitrogen stress relieved and air gauged and turned on centers delivers phenomenal accuracy when paired with match ammo. Upper comes with a thread protector, optional muzzle brake available or add your own 1/2-28 threaded muzzle device later.
AR15 Upper Specifications:
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
4150 Chrome Moly Vanadium Steel 5.56mm Barrel
Air-Gauged, Inspected and head-spaced
Bull Barrel Profile
Chambered in 5.56mm (Will also shoot .223)
24" Bull Profile barrel with M4 Extension
1/7 Barrel twist
.936" barrel diameter at gas block
1/2x28 threaded muzzle/barrel
Low profile gas block
Barrel dimpled to secure gas block
Rifle Length gas system
QPQ thread protector
15" Tactical Free Float 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, Short barreled rife restrictions apply. 20% restocking fees if you cannot take delivery due to state restriction. Dealer programs are available on