American Made
Buy Machine Shop Direct
Need Assistance? Call us at 425.530.0837
16" 5.56 SS Bull Barrel 1/7 10" HD Quad Upper
On Target With
Savings Of
Original Price $299.99
Sale Price $259.99
This product is not available for purchase.
Want uncompromising performance from a 16in upper?

Hardened Arms is delivering un-paralled accuracy and performance with our 16in 416R stainless steel bull barrels. The added mass of the bull barrel profile gives you a rigid platform and the 416R alloy further increases accuracy potential through reduced harmonics. Combined with a nitrogren stress relieve process cold bore shots will have the same impact point as the last shot in a string of fire. The 1/7 twist rate of this barrel will favor heavier 5.56/.223 bullets with the faster twist rate providing more bullet stability during flight.

Match shooter, Sharp shooter or Varmint hunter?

The challenge of medium range shooting and small game hunting is what has driven 5.56mm bull barrels in 16inch lengths to be perfected. Paired with match ammo the groupings are impressive to say the least from this upper. The improved harmonics of 416R over 4150CMV allows for a more repeatable exit trajectory of the projectile. The added weight will aid in keeping the rifle planted so you can see the bullets impact and adjust for the follow up shot. Threaded with a 1/2-28 thread allows the use of a muzzle brake, suppressor or other muzzle devices. Comes with a stainless bull barrel thread protector to keep your barrel safe in transport.

Want to run a bipod, sling or backup sights?

The 10" Hardened Arms quad rail installed on this upper has 1913 picatinny rails running the full length of the rail on all four sides lets you do it all. A picatinny bipod will give you the stability for precision shooting and will mount directly to the rail on the bottom. If your looking for even more stability consider upgrading to a longer rail that will move the bipod further out and give you a longer support "base".

16" SS Bull Barrel 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
  •     416R Stainless Steel 5.56mm Barrel
  •     Air-Gauged, Inspected and head spaced
  •     Nitrogen stress relieved
  •     Chambered in 5.56mm (Will also shoot .223)
  •     16" Bull Profile barrel with M4 Extension
  •     1/7 Barrel twist
  •     .936" barrel diameter at gas block
  •     1/2x28 threaded muzzle/barrel
  •     Low profile bull barrel gas block
  •     Barrel dimpled to secure gas block
  •     Carbine-Length gas system
  •     Stainless steel thread protector
  •     10" Hardened Arms Free Float Quad Rail (endcap available as upgrade)

Fits any mil-spec AR15 lower receiver.
515 Tucker Ave Friday Harbor, WA 98250 |
Phone: 425-530-0837