The Proof Research Carbon Fiber Sendero Barrel Blank (brand part number 100981) is a 20-inch .308 Winchester barrel blank in the standard Sendero contour, sold unchambered for a gunsmith to fit, chamber, and crown to a customer’s specific action. Wrapped in aerospace-grade carbon fiber over a steel core by Proof Research, this shorter, handier blank carries a 1:10 twist rate and a 2.5-inch breech length over a 1.20-inch shank diameter, weighing approximately 2 pounds, 11 ounces before final chambering.

Key Specifications

• Chambered for .308 Winchester cartridges at the customer’s chosen specification.
• Barrel length is 20 inches, the shortest option in this Sendero .308 lineup.
• Twist rate is 1:10, matched to standard .308 bullet weights.
• Breech length is 2.5 inches over a 1.20-inch shank diameter.
• Contour is Sendero, wrapped in carbon fiber over a steel core.
• Sold as a barrel blank for gunsmith chambering and fitting.
• Weighs approximately 2 pounds, 11 ounces unchambered.

Frequently Asked Questions

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

Why choose the shorter 20-inch length? A shorter barrel trims weight and improves handling on a finished rifle at a modest velocity trade-off versus the longer options.

Buy the Proof Research .308 Winchester 20-inch Sendero Blank

Give your gunsmith a premium lightweight blank for a handier custom build. Order this rifle barrel from our Lubbock, Texas gun shop for fast, insured shipping to your door.