Proof Research AR-Style 6mm ARC 16" Threaded Carbon Fiber Barrel Rifle Length 128657

SKU: FLX-126657

Regular price $1,035.98
Sale price $1,035.98 Regular price
Sale Sold out
Unit price
/per 
FREE GROUND SHIPPING on orders $50+
Additional or Expedited Shipping calculated at checkout.
This is a pre order item. We will ship it when it comes in stock.

Fast Shipping

American Owned

Easy Returns

Product Description

The Proof Research 128657 AR-Style Barrel in 6mm ARC represents the pinnacle of precision barrel manufacturing. Built on a full-profile, match-grade 416R stainless steel blank produced in Proof's own firearms division, this 16" rifle-length barrel is turned down to a significantly reduced contour and then wrapped in high-strength, aerospace-grade carbon fiber impregnated with a proprietary matrix resin developed by PROOF Research ACD. The result is a composite barrel that is stronger, lighter, and as accurate as the finest precision steel barrel available. Carbon fiber's unique ability to diffuse and transport heat through the barrel wall greatly enhances heat management, extending barrel life even under sustained fire. With a 5/8-24 muzzle thread, .750" gas journal diameter, and optimized for use with a Grendel Type II bolt, this barrel is an exceptional choice for any serious AR-platform build or upgrade.

Product Highlights

  • Full-profile, match-grade 416R stainless steel core wrapped in aerospace-grade carbon fiber for outstanding accuracy and durability
  • Up to 64% weight reduction compared to standard steel barrels, coming in at just 1 lb 12 oz
  • Proprietary PROOF Research ACD matrix resin provides superior composite strength and resilience in demanding environments
  • Rifle-length gas system with .750" gas journal and 5/8-24 muzzle threading for seamless AR-platform compatibility
  • 1:7.5 twist rate optimized for 6mm ARC with Grendel Type II bolt compatibility for reliable cycling

Specs

  • Brand: PROOF Research
  • Caliber: 6mm ARC (6 ARC)
  • Barrel Length: 16"
  • Twist Rate: 1:7.5
  • Gas Length: Rifle
  • Gas Journal Diameter: .750"
  • Port Size: .096"
  • Muzzle Thread: 5/8-24
  • Finish: Black Carbon Fiber
  • Material: 416R Stainless Steel with Aerospace-Grade Carbon Fiber Wrap
  • Weight: 1 lb 12 oz
  • Platform: AR-Style
  • Bolt Compatibility: Grendel Type II
  • UPC: 843068128657
  • MPN: 128657

Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.

The TLO Promise:

Customer Satisfaction Guaranteed

Fast Shipping

Most orders placed before 12 Noon (EST) ship same day and FREE SHIPPING on orders $50+

Easy Returns

No-Hassle Returns for 30 days from your purchase date.

Customer Service

TLO is a family-owned, American small business in GA. We treat you right.

Google Example // <- put this code in head section