Proof Research Sendero Carbon Fiber Barrel Blank Features The Proof Research Sendero Carbon Fiber Barrel Blank wraps a stainless steel core barrel in a carbon fiber jacket cutting weight versus a traditional steel barrel of the same contour while retaining the stiffness a precision shooter needs. The 1-in-7 twist rate stabilizes longer heavier .224 caliber bullets giving long-range shooters a faster-spinning option than a standard twist blank. Because it ships as a blank rather than a finished chambered barrel a gunsmith can thread chamber and fit it to the exact action and cartridge specification a customer requires. The Sendero contour is a proven heavy-barrel profile that balances rigidity for accuracy against the weight savings the carbon fiber wrap provides. At 22 inches with a 2.5 inch breech and a 1.20 inch shank diameter the blank is sized for a standard bolt action build giving a gunsmith a known starting dimension to machine from. The carbon fiber exterior also dissipates heat more efficiently than bare steel which helps the barrel resist the point-of-impact shift that comes with a hot barrel during a long string of fire. Weighing 2 lbs 13 oz the blank keeps a finished custom rifle noticeably lighter than an equivalent steel-barreled build without sacrificing the accuracy the Sendero profile is known for. For custom builders and gunsmiths chambering a precision .224 caliber rifle the Proof Research Sendero Carbon Fiber Barrel Blank is available for sale at GrabAGun. Proof Research Sendero Carbon Fiber Barrel Blank Specifications Manufacturer: Proof Research Model: Sendero Carbon Fiber Barrel Blank Caliber: .224 Cal Barrel Length: 22 Twist Rate: 1-in-7 Breech Length: 2.5 Shank Diameter: 1.20 Contour: Sendero Finish: Stainless Finish Type: Stainless Steel Weight: 2 lbs 13 oz Available At: GrabAGun