Proof Research Barrel for Defiance Ruckus Features The Proof Research pre-fit barrel for the Defiance Ruckus is wrapped in high-strength aerospace-grade carbon fiber impregnated with a proprietary matrix resin cutting barrel weight by roughly 64% compared to a traditional steel barrel. This weight savings improves overall rifle handling and reduces fatigue for shooters carrying the rifle over long distances in the field or on a precision course. Chambered in 6.5 Creedmoor with a 1:8 twist rate the barrel stabilizes the popular mid-weight to heavy bullet options commonly used in long-range competition and hunting. Carbon fiber construction also improves heat dissipation over bare steel helping maintain accuracy through strings of rapid fire. The barrel is chambered and threaded specifically for a simple low-tool installation requiring only that it be torqued onto the action and checked for correct headspace before shooting. A 5/8x24 threaded muzzle accepts standard muzzle brakes and suppressors for recoil or sound management. This pre-fit design is compatible only with Defiance Ruckus Tenacity and Anti actions using the recessed bolt nose option and will not fit actions with cone flat or control round feed bolts. For Defiance action owners seeking a lightweight precision-ready 6.5 Creedmoor barrel this Proof Research option offers a straightforward upgrade path. Proof Research Barrel for Defiance Ruckus Specifications Manufacturer: Proof Research Compatible Hosts: Defiance Ruckus Tenacity Anti Caliber: 6.5 Creedmoor Barrel Length: 24 Contour: Sendero Twist Rate: 1:8 Material: Carbon Fiber Threaded: Yes 5/8x24 Weight: 3 lbs Available At: GrabAGun