Proof Research's PR15 PXT barrels bring the company's match-grade standards to the AR-15 in all-stainless-steel form, for builders who want Proof accuracy without the carbon-fiber price. This 18-inch barrel is chambered in 6mm ARC, the cartridge that transformed the AR-15 into a genuine 1,000-yard platform, and uses a standard .750-inch gas block journal for broad compatibility with popular gas systems. An 18-inch 6mm ARC build hits a sweet spot for precision gas-gun matches and open-country hunting alike. Proof's reputation for tight tolerances and hand-finished bores is the reason their barrels anchor so many serious builds.

In stock and ready to ship straight to your door from Dawson Defense, an Arizona-owned licensed dealer.