Christensen Arms 308 Caliber 20'' 1-10 Twist Target Contour Carbon Fiber Blank

If you're a gunsmith or serious builder looking to craft a lightweight, match-grade .308 rifle, the Christensen Arms .308 Caliber 20" 1-10 Twist Target Contour Carbon Fiber Blank gives you the precision foundation you need. This carbon fiber barrel blank pairs Christensen Arms' proprietary carbon fiber layering system with a match-grade 416R stainless steel bore, delivering the accuracy of a traditional steel barrel with meaningful weight savings—critical when you're building a hunting rifle or precision target gun where every ounce counts.

The bore itself is manufactured to exacting standards: measured and held to a tolerance of ±.0001", then bored, reamed, hand-lapped, and button-rifled to ensure consistency shot after shot. The 1-10 twist rate stabilizes .308 projectiles across the full range of bullet weights commonly used in hunting and competition, from lighter varmint loads to heavy magnums. The 20" target contour provides a solid balance between rigidity and manageability, while the threaded muzzle and included thread protector set you up to add a brake, suppressor, or other muzzle device down the road.

This is a blank—meaning chamber finishing and final fitting must be completed by a qualified gunsmith. If you're outsourcing that work, you'll appreciate that Christensen Arms has already done the hardest part: precision bore work and rifling that takes guesswork out of the equation. The carbon fiber construction keeps the finished barrel light without sacrificing the stiffness that accuracy demands, making this blank an excellent choice for long-range hunting builds, competition rigs, or any project where weight matters.

Key Features

• Match-grade 416R stainless steel bore (±.0001" tolerance) hand-lapped and button-rifled for precision
• Carbon fiber wrapped for reduced weight compared to steel barrel of same contour
• 1-10 twist rate suitable for a wide range of .308 bullet weights
• 20" target contour balances stiffness and handling
• Threaded muzzle with thread protector included
• Proprietary Christensen Arms carbon fiber layering system

Specifications

Frequently Asked Questions

Can I use this barrel blank right out of the box?

No. This is a gunsmith blank—the bore and rifling are finished, but the chamber must be cut and headspaced by a qualified gunsmith to match your action and desired cartridge. Do not attempt chamber finishing without proper equipment and experience.

What bullet weights does the 1-10 twist stabilize?

A 1-10 twist is a versatile rate for .308 hunting and target loads, designed to stabilize the full range of .308 projectiles in common use. Specific bullet weight performance depends on factors like velocity and bullet length; consult ballistics references or your gunsmith for your particular load.

How much lighter is this carbon fiber blank than a steel barrel?

The barrel blank weighs between 2 lb 12 oz and 3 lb 5 oz depending on the exact configuration. A steel barrel of the same 20" target contour will be noticeably heavier, making this carbon fiber construction valuable for hunters and field shooters where weight reduction matters.

What's included with the barrel blank?

The barrel comes with a threaded muzzle and a thread protector. All other components—action, stock, optics, and any muzzle devices—are sourced separately as part of your build.