The Proof Research PR15 .338 ARC 16in Carbon Fiber AR Barrel (brand part no. 145609) is a PR15-series AR-platform barrel chambered in .338 ARC and built from carbon fiber, cut to 16 inches on a pistol-length gas system for a compact, maneuverable build.

Key Specifications

• Chambered in .338 ARC
• Barrel length of 16 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 carbon fiber

Frequently Asked Questions

What gas system does this barrel use? A pistol-length AR-15 gas system, matched to the 16in barrel length.

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

Buy the Proof Research PR15 .338 ARC 16in Carbon Fiber AR Barrel

Order the Proof Research PR15 .338 ARC 16in Carbon Fiber AR Barrel from our catalog, or browse more AR15 barrels at Schaefer Defense. Ships fast from our Lubbock, Texas gun shop.