The Proof Research Carbon Fiber Barrel Blank in Sendero Light contour (brand part number 105337) is a .264-caliber (6.5mm bore) barrel supplied unchambered, ready for a gunsmith to finish to your specific cartridge, whether that’s 6.5 Creedmoor, 6.5 PRC, or another .264-bore round. Proof builds it from a 416R stainless steel core wrapped in aerospace-grade carbon fiber, cutting up to 64% of the weight of a traditional steel barrel of the same contour while holding match-grade accuracy potential. The carbon wrap also improves heat dissipation, keeping the barrel cooler and more consistent through longer strings of fire, which helps eliminate point-of-impact shift during high-volume shooting. Reduced harmonic vibration rounds out the package, adding up to what Proof calls unprecedented durability for a barrel this light.

Key Specifications

• Bore diameter of .264 inches (6.5mm), supplied unchambered.
• Length of 24 inches.
• Twist rate of 1:7.5.
• Sendero Light contour.
• Core is 416R stainless steel wrapped in carbon fiber.
• Finished in black.
• Up to 64% lighter than a comparable steel barrel.
• Improved heat dissipation for a cooler, longer-lasting barrel.
• No point-of-impact shift during high-volume fire.
• Reduced harmonic vibration for added durability.

Frequently Asked Questions

Is this barrel chambered? No, it ships as an unchambered blank for a gunsmith to chamber to your specific .264-bore cartridge.

How much lighter is this than a steel barrel? Up to 64% lighter than a comparable steel barrel of the same contour.

What contour is this blank? Sendero Light.

Buy the Proof Research Carbon Fiber Barrel Blank

Start a custom .264-bore build with a match-grade blank that sheds weight without sacrificing durability. Order this carbon fiber barrel blank from Proof Research through our rifle barrels lineup, and our Lubbock, Texas team will get it shipped straight to your door.