Proof Research PR10 AR-10 Barrel Features The Proof Research PR10 barrel wraps a stainless steel core in carbon fiber a construction method that dramatically reduces weight compared to a solid steel barrel while retaining the stiffness needed for consistent accuracy. Its 1-in-8 twist rate is matched to stabilize a wide range of 6.5 Creedmoor bullet weights giving shooters flexibility in load selection for hunting or long-range precision work. The heavy .875 inch journal contour resists heat-induced stringing during extended strings of fire which matters during a match or a long day at the range. A 5/8x24 thread pattern comes standard so the barrel is ready to accept a muzzle brake compensator or suppressor without additional machining. At just under 3 pounds and 20 inches in length the PR10 is built as a direct upgrade for AR-10 pattern rifles letting builders shave weight off the front end without sacrificing barrel life or accuracy potential. The stainless steel finish provides straightforward corrosion resistance for long-term reliability in the field or at the range. Because it follows standard AR-10 barrel extension and gas system dimensions installation is compatible with common AR-10 upper receivers. For shooters looking to build or upgrade a lightweight accurate 6.5 Creedmoor AR-10 the Proof Research PR10 is a proven option available at GrabAGun. Proof Research PR10 AR-10 Barrel Specifications Manufacturer: Proof Research Model: PR10 Carbon Fiber AR Barrel Compatible Hosts: AR-10 Caliber: 6.5 Creedmoor Barrel Length: 20 Twist Rate: 1:8 Thread Pattern: 5/8x24 Contour: Heavy / .875 Material: Carbon Fiber Wrapped Stainless Steel Weight: 2 lbs 14 oz Available At: GrabAGun