Proof Research is best known for carbon-fiber barrels, but their stainless-steel PR15 PXT line delivers the same match-grade accuracy standards in a traditional format. This 16-inch AR-15 barrel is chambered in 6mm ARC, the cartridge that transformed the AR platform into a legitimate mid-range precision and deer rig, and is cut for a .750 gas block. Proof's button-rifled stainless barrels are held to exacting tolerances, so handloaders and factory-ammo shooters alike can expect consistent, repeatable groups. A smart upgrade for any precision AR build.

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