The Proof Research .224 Carbon Fiber Barrel Blank at 20 inches, Sendero contour (brand part no. 103432), gives gunsmiths and custom rifle builders a lightweight starting point for a varmint or predator build in .224-family calibers. Proof cuts this blank to the standard Sendero profile with a 2.5-inch breech length, and wraps it in carbon fiber to shed weight compared to a comparable steel barrel of the same contour. A 1:7 twist rate stabilizes a wide range of .224-caliber bullet weights, including heavier options favored for wind-bucking performance at distance. As a blank, it still requires chambering and fitting by a gunsmith before it becomes part of a complete rifle.

Key Specifications

• Chambered in .224-family calibers.
• Measures 20 inches long as a blank.
• Cut with a 1:7 twist rate.
• Uses a Sendero contour.
• Breech length of 2.5 inches.
• Shank diameter of 1.20 inches, sized for common bolt-action receivers.
• Weighs approximately 2 pounds 14 ounces as a blank.

Frequently Asked Questions

Is this barrel chambered? It ships as a blank, so it still requires chambering and fitting by a gunsmith.

What contour does this blank use? Proof’s standard Sendero profile.

What twist rate does it use? 1:7, suited to a wide range of .224-caliber bullet weights, including heavier options.

Buy the Proof Research .224 Sendero Barrel Blank

Start your next varmint build light with this Proof Research blank, part of our full rifle barrels selection. Order it from our Lubbock, Texas gun shop for fast, insured shipping.