Proof Bbl Cf Pr15 22Arc 18 Rifle 5/8-24

The Proof Research .22 ARC barrel is a precision carbon-fiber construction barrel purpose-built for the modern intermediate cartridge that's gaining serious traction in AR platforms. This 18-inch rifle-length barrel pairs the ballistic efficiency of .22 ARC with Proof's known manufacturing standards, making it a solid choice for hunters and shooters looking to build or upgrade an AR in this emerging caliber. The carbon-fiber construction keeps weight down without sacrificing rigidity—a key advantage if you're building a versatile hunting rifle or competition gun that sees extended use.

The 7-twist rate is optimized for the .22 ARC's typical bullet weights, and the rifle-gas-length system provides reliable cycling across a broad range of loads and conditions. The .750 gas journal and .099 port sizing are engineered to work in concert with the barrel's geometry for consistent performance. At just under 2 pounds, this barrel won't bog down your platform, whether you're assembling a lightweight field gun or a precision mid-range shooter.

Proof Research's carbon-fiber barrels are known for thermal stability and longevity. The muzzle is threaded 5/8-24, a standard that opens up a wealth of suppressor and muzzle-device options. If you're already committed to .22 ARC or curious about building around it, this barrel delivers the precision and practical weight savings that make AR modularity worthwhile.

Key Features

• Carbon-fiber construction for lightweight, rigid performance
• Rifle-length gas system for reliable cycling and versatility
• 7-twist rate optimized for .22 ARC ammunition
• 5/8-24 threaded muzzle for broad suppressor and device compatibility
• Precision manufactured by Proof Research for consistent accuracy

Specifications

Frequently Asked Questions

What muzzle devices and suppressors will fit this barrel?

The 5/8-24 muzzle threads accept any suppressor, flash hider, muzzle brake, or other device with matching 5/8-24 female threads. This is a standard thread pitch with many options available from major manufacturers.

Is this barrel suitable for .22 ARC hunting?

Yes. The 18-inch rifle-length barrel and 7-twist rate are appropriate for .22 ARC, which is designed as a mid-range hunting and target cartridge. Performance will depend on your specific ammunition selection and intended application.

What's the weight advantage of carbon fiber?

This barrel weighs just under 2 pounds, which is notably lighter than a comparable steel barrel. The carbon-fiber construction reduces overall rifle weight without compromising barrel rigidity or thermal stability.

Will this barrel work with standard AR-15 builds?

This barrel is chambered in .22 ARC and is designed for AR platforms that support that caliber. Verify upper receiver and bolt compatibility with your specific platform before assembly.