JP Enterprises Supermatch Barrel With Headspaced Jp Enhanced Bolt 6.5 Creedmoor 22in Black. This barrel also includes a JP High Pressure EnhancedBolt (with firing pin) individually head-spaced to the barrel for flawless fit and function. Specifications for JP Enterprises Supermatch Barrel With Headspaced Jp Enhanced Bolt 6.5 Creedmoor: Manufacturer: JP Enterprises Fabric/Material: 416R Stainless Caliber: 6.5mm Creedmoor Barrel Length: 22 in Gas System Length: Rifle +2 Length Gas Block Journal Size-Diameter: .875 in Threads per Inch: 5/8x24 Barrel Twist Rate: 1-8 Weight: 54.4 oz Condition: New Package Contents: JP Enterprises Supermatch Barrel With Headspaced Jp Enhanced Bolt 6.5 Creedmoor JP Enterprises JPSM6.5C-22M8XL-BT: Supermatch Barrel With Headspaced Jp Enhanced Bolt 6.5 Creedmoor 22in Black