Proof Research PR15 Carbon Fiber AR Barrel 6mm ARC 18" Black - 128671

This is a rifle-length AR-platform barrel chambered in 6mm ARC with an 18" length and 1:7.5" twist rate. The barrel features a carbon fiber wrap over 416R stainless steel with a .750" gas journal diameter, threaded muzzle (5/8x24), and is ready for direct installation on AR-15 platforms.