The Proof Research Barrel Blank is a carbon fiber-wrapped .264-caliber (bore diameter) bolt-action barrel blank in the Sendero contour, supplied unchambered for a gunsmith to fit and chamber to your 6.5mm cartridge of choice (Proof Research part no. 110164).

Key Specifications

• .264-caliber bore diameter, unchambered blank
• 26-inch barrel length
• 1-in-7.5 rate of twist
• Sendero contour
• 2.5-inch barrel breech, 1.20-inch shank diameter
• Carbon fiber-wrapped construction
• Built for a bolt-action rifle, not an AR-15 platform
• Weighs approximately 3 lb 5 oz

Frequently Asked Questions

Is this an AR-15 barrel? No — despite this listing’s category, this is a bolt-action barrel blank (per the product name and specs), not an AR-15 barrel.

Is this barrel already chambered? No, it’s an unchambered blank sold by bore diameter; a gunsmith chambers and fits it to your specific 6.5mm cartridge and action.

What’s the twist rate? It has a 1-in-7.5 rate of twist, suited to heavier 6.5mm bullets.

Buy the Proof Research Carbon Fiber Barrel Blank, .264 Caliber, 26-Inch Sendero

Order the Proof Research Carbon Fiber Barrel Blank, .264 Caliber, 26-Inch Sendero from a Lubbock, TX gun shop. Shop more Proof Research parts or browse the AR15 Barrels category at Schaefer Defense.