The Proof Research PR15 6ARC 22 5/8-24 7.5TW barrel is built for shooters who demand precise, repeatable performance from their AR-platform rifles. This stainless steel barrel features a 22 inch length with a threaded 5/8x24 muzzle, ready for brakes or suppressor mounts, and is purpose-built around the efficient 6mm ARC cartridge.

This configuration is ideal for extended-range target work, practical competition, or refining a precision gas gun build where consistency matters more than flash. The 7.5 twist rate is optimized for modern high-BC 6mm projectiles, helping maintain stability and accuracy at distance. Whether you are upgrading an existing rifle or starting a new project, this barrel reflects Proof Research’s focus on accuracy, durability, and careful engineering.

Key Features:

• Manufacturer: Proof Research
• Model: PR15 6ARC 22 5/8-24 7.5TW
• Caliber: 6mm ARC
• Barrel Length: 22"
• Threaded Barrel: 5/8x24
• Category: Rifle Barrel