The Proof Research PR15 .338 ARC 10in Stainless AR Barrel (brand part no. 144848) is a PR15-series AR-platform barrel chambered in .338 ARC and built from stainless steel, cut to 10 inches on a pistol-length gas system for a compact, maneuverable build.

Key Specifications

• Chambered in .338 ARC
• Barrel length of 10 inches
• Rifling twist rate of 1-in-8
• Built for a Pistol-length AR-15 gas system
• Gas block journal diameter of .750-inch
• Muzzle threaded 5/8-24
• Constructed from stainless steel

Frequently Asked Questions

What gas system does this barrel use? A pistol-length AR-15 gas system, matched to the 10in barrel length.

Is this barrel ready to install? Yes, it ships fully chambered and ready to install onto a compatible AR-15 upper.

Is this barrel itself an NFA item? No. This is a bare barrel under the 16-inch federal rifle minimum with no receiver included, so it is not itself a regulated Short-Barreled Rifle. Federal SBR rules only apply once it is assembled onto a complete, shouldered rifle lower without a prior approved ATF Form 1 — confirm your build configuration before assembly.

Buy the Proof Research PR15 .338 ARC 10in Stainless AR Barrel

Order the Proof Research PR15 .338 ARC 10in Stainless AR Barrel from our catalog, or browse more AR15 barrels at Schaefer Defense. Ships fast from our Lubbock, Texas gun shop.