The Proof Research 130421 PR15 6mm ARC 14.5" Carbon Fiber Barrel brings match-grade precision to the AR-15 platform in a lightweight, carbon fiber–wrapped package. Built around a 416R stainless steel core and wrapped in carbon fiber, this 14.5 inch barrel features a threaded 5/8x24 muzzle and a fast 1:7.5 twist to stabilize modern 6mm ARC projectiles while shedding significant weight compared to traditional steel barrels.

This intermediate-length gas system barrel is designed for shooters who want a soft recoil impulse, excellent heat dissipation, and consistent point of impact during extended strings of fire. Ideal for precision gas-gun builds, practical competition, and demanding range use, it offers a balance of maneuverability and stability in a compact length. The combination of Proof Research’s carbon fiber construction and caliber-matched gas system reflects the company’s focus on accuracy, reliability, and advanced barrel technology.

Key Features:

• Manufacturer: Proof Research
• Model: 130421
• Caliber: 6mm ARC
• Condition: New
• Barrel Length: 14.5"
• Twist Rate: 1:7.5"
• Muzzle Threads: 5/8x24
• Gas System Length: Intermediate
• Product Type: Barrel
• Platform: AR-15
• Barrel Finish: Carbon Fiber
• Barrel Weight: 1.5 lbs