Proof Research .243 Bore Sendero Bolt-Action Carbon Fiber Barrel Blank, 18-inch

The Proof Research .243-bore Sendero Carbon Fiber Bolt-Action Barrel Blank, 18 inches (brand part no. 104514), is an unchambered barrel blank built in Proof Research’s Sendero contour for gunsmiths and builders finishing a custom .243-bore bolt-action rifle. Proof Research builds this blank from a match-grade 416R stainless steel core turned down to reduce weight, then wraps it in proprietary aerospace-grade carbon fiber, cutting significant weight versus a comparable all-steel barrel without sacrificing rigidity or accuracy potential. As a blank, this barrel ships unchambered so a gunsmith can thread, chamber, and finish it to the specific .243-bore cartridge you’ve chosen, giving serious builders full control over chamber specs rather than a fixed factory chambering.

Key Specifications

• Bored to .243 caliber, ready for gunsmith chambering to your chosen .243-bore cartridge.
• Cut to an 18 inch length before chambering and final fitting.
• Rifled with a 1:7.5 twist rate, suited to heavier, higher-BC .243-bore bullets.
• Machined in Proof Research’s Sendero contour, a proven balance of stiffness and weight.
• Built around a 416R stainless steel core wrapped in aerospace-grade carbon fiber.
• Sold as an unchambered barrel blank, intended for gunsmith fitting rather than direct installation.

Frequently Asked Questions

Is this barrel ready to install out of the box? No, it ships as an unchambered blank that a gunsmith chambers and fits to your action and cartridge.

Why choose a carbon fiber barrel blank? The carbon fiber wrap significantly cuts weight compared to an all-steel barrel of the same contour and length.

Buy the Proof Research .243 Sendero Carbon Fiber Barrel Blank

Builders working with a gunsmith on a custom .243-bore precision rifle will get genuine weight savings without giving up rigidity by starting with this Sendero-contour carbon fiber blank. Order it through our Lubbock, Texas gun shop and browse more rifle barrels from Proof Research and other trusted brands.