proof research 6mm arc 18in carbon fiber ar-15 barrel
PROOF RESEARCH 6MM ARC 18IN CARBON FIBER AR-15 BARREL

PROOF RESEARCH 6MM ARC 18IN CARBON FIBER AR-15 BARREL

$849.00

Material: Carbon Fiber/Stainless Steel

Gas tube: SS included

Gas System Length: Intermediate

Barrel Length: 18″

Gas Block Size: .750

Caliber: 6mm ARC

Twist: 7.5″

Grooves: 4

Thread Pitch: 5/8×24

MFG Part#:128671

This PR15 (AR-15) barrel will work in any mil-spec AR-15 upper receivers.

*6mm ARC also uses a different Bolt than a standard 5.56*

2 in stock

PROOF RESEARCH 6MM ARC 18IN CARBON FIBER AR-15 BARREL 128671

Carbon fiber has long been hailed across many industries—aerospace, cycling, alternative energy—as a wonder material making everything lighter and stronger. When employed in a rifle barrel the benefits extend beyond reducing weight and increasing strength. 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 carbon fibers we use have a unique ability to diffuse heat along the length of the barrel (much like fiber optics transmit light). Carbon fiber also moves heat very effectively through the wall (thickness) of the barrel greatly increasing heat transport resulting in barrels that cool faster, maintain accuracy over longer sessions of fire, and live longer. 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 durable to perform in the most demanding environments. They’re not just lighter—they’re better.

  • 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

Learn more about PROOF RESEARCH 6MM ARC 18IN CARBON FIBER AR-15 BARREL 128671 here.

See other Proof Products we carry here.

Additional information

Weight 6 lbs
Dimensions 30 × 6 × 6 in