The Proof Research .308 Sendero Carbon Fiber Barrel Blank (brand part number 107911) is an unchambered bolt-action barrel built for gunsmiths and custom rifle builders working in .308 Winchester. Proof Research wraps a Sendero-contour steel core in aerospace-grade carbon fiber, cutting overall weight to just 3lbs-3oz while retaining the heat dissipation and accuracy of a heavier steel barrel. At 26 inches with a 1-in-8-inch twist rate, this blank is sized for long-range .308 shooting where extended barrel length and a fast twist help stabilize heavier match bullets. As a blank, it ships unchambered and unthreaded, ready for a gunsmith to chamber, crown, and fit to a specific action.

Key Specifications

• Bored for .308 Winchester caliber, one of the most common long-range bolt-action cartridges, ready for a gunsmith to chamber.
• Overall barrel length is 26 inches, sized for long-range precision shooting.
• Rifling twist rate is 1-in-8 inches, suited to stabilize heavier .308 match bullets.
• Weighs just 3lbs-3oz, thanks to a carbon-fiber-wrapped steel core.
• Breech length measures 2.5 inches, a key dimension for gunsmith chambering work.
• Shank diameter is 1.20 inches at the breech end.
• Cut in Proof Research’s Sendero contour, a stiff, target-style barrel profile.

Frequently Asked Questions

Is this barrel ready to install? No, this is an unchambered blank; a gunsmith must chamber, thread, and crown it to fit a specific action.

Why choose a carbon-fiber-wrapped barrel? It cuts significant weight versus a solid steel barrel of the same contour while retaining strong heat dissipation for sustained precision shooting.

What twist rate does this barrel use? 1-in-8 inches, matched to stabilize heavier .308 match-grade bullets.

Buy the Proof Research .308 Sendero Carbon Fiber Barrel Blank

Order this Proof Research .308 barrel blank from our Lubbock, Texas gun shop for fast, insured shipping to your gunsmith. Browse more Proof Research rifle barrels for your custom build.