Proof Research is best known for its carbon fiber barrels, but the company's stainless steel PR15 PXT AR barrels deliver the same match-grade machining and accuracy pedigree in a traditional format. This 20-inch barrel in 6mm ARC is cut for a .750 gas block and built for the precision gas-gun crowd — the 6mm ARC delivers remarkable long-range ballistics from AR-15-sized actions, and a full-length barrel wrings out the velocity that makes the cartridge shine. A serious upgrade for a precision AR build from one of the most respected barrel makers in the industry.

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