PROOF Research Carbon Fiber 6.5 Creedmoor Barrel for SF-308


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Upgrade your Small Frame .308 with the PROOF Research Carbon Fiber wrapped 6.5CM barrel with matched bolt.

This barrel will only fit in the Adams Arms Small Frame .308 or DPMS Gen II type receiver.

Option for Rifle+2″ drive rod or gas tube.

  • 24″ Barrel
  • .750″ Shoulder
  • 1:8 Twist
  • Muzzle Thread Pattern 5/8″-24
  • PROOF Carbon Fiber Wrapped 416R stainless steel
  • Chambered 6.5 Creedmoor


“Our patented manufacturing process begins with full-profile, match-grade 416R stainless steel barrel blanks that are made in our firearms division. These blanks are then turned down to a significantly reduced profile greatly reducing weight. This reduced contour barrel is then wrapped with high-strength, aerospace-grade carbon fiber impregnated with a proprietary matrix resin developed by our advanced composites division, PROOF Research ACD.

The aerospace-grade carbon fiber we use has a specific strength up to 30 times that of stainless steel and a specific stiffness up to 7 times greater than steel. But strength and stiffness are only part of the equation. Heat conductivity and thermal expansion are also of paramount importance when developing a match-grade carbon fiber barrel. Our helical wrapping pattern favors the longitudinal thermal diffusivity of the carbon fibers (along the length of the barrel) allowing them to more efficiently dissipate heat emanating from the barrel rather than insulating it.


Because our rifle barrels are engineered for thermal performance, they also move heat very effectively through the wall (thickness) of the barrel, greatly increasing heat transport and resulting in barrels that cool faster and maintain accuracy over longer sessions of fire.

The end result is an aerospace-grade, high-fiber content composite barrel that is stronger, lighter, as accurate as the finest precision steel barrel, and maintains its accuracy in the most demanding environments.

We didn’t invent carbon fiber-wrapped rifle barrels. We just perfected them.

  • Up to 64% lighter than traditional steel barrels of similar contour
  • Match-grade accuracy
  • Improved heat dissipation for cooler and longer lasting barrels
  • No point-of-impact shift during high-volume fire
  • Reduced harmonic barrel vibration
  • Unprecedented durability

Additional Information

Weight 5 lbs
Dimensions 30 × 4 × 4 in
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