Proof Research PR15 223 Wylde 11.5" 1:7 Twist Carbon Fiber Barrel - 5/8x24

The Proof Research PR15 is an AR-15 platform drop-in barrel chambered in .223 Wylde, a chamber geometry that accepts both .223 Remington and 5.56 NATO ammunition. The compact 11.5-inch barrel features a carbon fiber construction with a 1:7 twist rate and 5-groove rifling.