The Proof Research Sendero Carbon Fiber Barrel Blank (brand part no. 105504) is a 20-inch, .264 caliber bolt-action barrel sold unchambered and unfinished, intended for a gunsmith to chamber, thread, and fit to a specific action. Built in the Sendero contour with Proof’s carbon-fiber-wrapped construction, it carries a 1-in-8 twist rate suited to long, heavy-for-caliber 6.5mm bullets favored in long-range shooting. At roughly 3 pounds 12 ounces before final chambering and finishing, it is substantially lighter than a comparable steel blank of the same contour and length. Because it ships as a blank rather than a finished barrel, final fit, chamber reamer selection, and headspace are the responsibility of the gunsmith performing the installation.

Key Specifications

• Chambered around .264 caliber cartridges once finished by a gunsmith.
• 20-inch length in the Sendero contour.
• 1-in-8 twist rate for long, heavy-for-caliber 6.5mm bullets.
• 2.5-inch breech length and 1.20-inch shank diameter for standard bolt-action fitting.
• Carbon-fiber-wrapped construction keeps weight to roughly 3 pounds 12 ounces.
• Sold as an unfinished blank for a gunsmith to chamber and fit.

Frequently Asked Questions

Does this barrel arrive chambered and ready to install? No, it is an unfinished blank that a gunsmith chambers, threads, and fits to your action.

What contour is this blank cut in? The Sendero contour, at a 20-inch length.

Buy the Proof Research Sendero Carbon Barrel Blank

Start a custom precision build with a lightweight carbon-fiber blank ready for your gunsmith. Order this Proof Research barrel blank from our rifle barrel selection, and our Lubbock, Texas team will get it shipped fast.