The Proof Research Bbl Cf Blank Bolt .224 Sendero 20 1-7 is a carbon fiber–wrapped barrel blank built for precision bolt-action rifle projects. Using a stainless steel core surrounded by a rigid carbon fiber sleeve, this Sendero-contour blank delivers a balance of stiffness and reduced weight that supports consistent accuracy over extended strings of fire.

This 20 inch .224 caliber blank with a 1-in-7 twist rate is ready for your gunsmith to chamber and thread to your preferred cartridge and action. The specified 2.5 inch breech length, 1.20 inch shank diameter, and 2 lbs 14 oz weight make it well suited for long-range varmint, competition, or general precision rifle builds where handling and repeatable performance matter. It reflects Proof Research’s focus on modern materials and careful barrel construction.

Key Features:

• Manufacturer: Proof Research
• Model: Carbon Fiber Barrel Blank
• Caliber: .224
• Barrel Length: 20 inches
• Rate of Twist: 1-in-7
• Barrel Contour: Sendero
• Barrel Breech Length: 2.5 inches
• Shank Diameter: 1.20 inches
• Weight: 2 lbs 14 oz