Proof Research Defiance Ruckus Barrel Features The Proof Research pre-fit barrel is wrapped in high-strength aerospace-grade carbon fiber impregnated with a proprietary matrix resin resulting in a barrel that is 64 percent lighter than a traditional steel barrel of the same contour. This carbon fiber wrap also improves heat dissipation allowing the barrel to run cooler across longer strings of fire and maintain accuracy shot after shot. Chambered in 6.5 PRC with a 1:7.5 twist rate the Sendero-contour barrel is designed to stabilize the heavier high-BC bullets favored by long-range and precision rifle shooters. A 5/8x24 threaded muzzle accepts a suppressor or muzzle brake for recoil management and reduced signature. Designed as a pre-fit barrel for the Defiance Ruckus Tenacity and Anti actions with a recessed bolt nose installation requires only a simple torque-on procedure and a headspace check with proper gauges before heading to the range. This drop-in compatibility eliminates the need for extensive gunsmithing typically associated with barrel swaps saving time and machine-shop expense. At just 3 pounds the barrel keeps overall rifle weight down an important consideration for hunters and long-range shooters who carry their rifle over distance. Precision shooters seeking unprecedented accuracy from a lightweight pre-fit carbon fiber barrel will find this Proof Research offering available for sale at GrabAGun. Proof Research Defiance Ruckus Barrel Specifications Manufacturer: Proof Research Model: Defiance Ruckus Barrel Compatible Hosts: Defiance Ruckus Tenacity Anti Caliber: 6.5 PRC Barrel Length: 24 Contour: Sendero Twist Rate: 1:7.5 Muzzle Thread: 5/8x24 Material: Carbon Fiber Weight: 3 lbs Available At: GrabAGun