Proof Research PR15 PXT 152249 16" 6mm ARC Stainless Steel AR-15 Barrel

This PROOF Research PR15 PXT barrel is a 16-inch stainless steel AR-15 barrel chambered in 6mm ARC, intended for AR-pattern builds seeking modern rifling technology and reliable performance. It uses PROOFs PXT (Exponential Twist) rifling with a 1:7.5 finish twist, a system that employs a progressive twist rate and a smoother rifling profile to manage how the bullet engages the bore. The barrel features a rifle-length gas system, 0.750-inch gas journal, and 5/8x24 threaded muzzle, offering broad compatibility with standard AR-15 gas system parts and muzzle devices, and comes fully chambered for straightforward installation on appropriate 6mm ARC AR-15 platforms.

• PXT exponential twist rifling with 1:7.5 finish twist
• 16-inch stainless 6mm ARC AR-15 barrel configuration
• Rifle-length gas, .750 gas journal, 5/8x24 muzzle threads

This PROOF Research 6mm ARC PXT barrel suits builders and shooters wanting a 16-inch AR-15 barrel that incorporates advanced rifling geometry. Its combination of progressive PXT rifling, stainless steel construction, and AR-15 compatible gas and muzzle dimensions supports consistent performance in a compact gas-gun package.