The Proof Research Sendero .264 caliber carbon fiber barrel blank (brand part number 109083) is an 18-inch unchambered barrel for a gunsmith to fit to a compact, hard-hunting 6.5mm bolt-action build. It carries the full-weight Sendero contour and is wrapped from aerospace-grade carbon fiber over a 416R stainless steel liner, cutting barrel weight by as much as 64 percent versus a comparable steel barrel. At 18 inches, this blank suits a shorter, quicker-handling rifle for mountain or backcountry hunting where a shorter barrel means less to snag on brush and less weight to carry all day. Chambering, threading, and finishing are performed by the buyer’s gunsmith.

Key Specifications

• Barrel length in the blank measures 18 inches, sized for a compact, easy-carrying 6.5mm hunting rifle.
• Rate of twist is 1:8, a stabilizing rate suited to mid-to-heavy .264 caliber (6.5mm) bullets.
• Breech length is 2.5 inches, the dimension a gunsmith needs to chamber this blank to the buyer’s action.
• Shank diameter holds at 1.20 inches, matching standard bolt-action barrel shank tooling.
• Contour is the full-weight Sendero profile, balancing rigidity against the weight savings of the shorter length.
• Finished weight comes in around 2 pounds 10 ounces, light for an 18-inch barrel of this contour.
• Construction pairs a 416R stainless steel liner with a carbon-fiber wrap for reduced weight and faster heat dissipation.

Frequently Asked Questions

Does this barrel arrive chambered and ready to install? No, it ships as an unchambered blank for a gunsmith to chamber, thread, and fit to the buyer’s specific 6.5mm bolt-action receiver.

Is 18 inches long enough for good 6.5mm performance? Yes, an 18-inch 6.5mm barrel still delivers strong terminal performance for hunting distances while keeping the rifle shorter and easier to carry and maneuver.

How much lighter is this than a steel barrel of the same length? The carbon-fiber wrap can cut weight by up to 64 percent versus a comparable steel barrel of the same contour and length.

Buy the Proof Research Sendero .264 18in Barrel Blank

Order this Proof Research Sendero .264 caliber carbon fiber barrel blank from a Lubbock, Texas gun shop for your next mountain rifle build. Browse more calibers in our rifle barrels selection.