PROOF Research 143377 PR15 .223 Wylde 14.5-Inch Barrel with 5/8-24 Thread

The PROOF Research 143377 PR15 barrel is designed for rifle builders and shooters seeking a dependable .223 Wylde chamber with broad ammunition compatibility. The .223 Wylde chamber is optimized for use with both .223 Remington and 5.56 NATO ammunition, providing a practical configuration for versatile rifle setups. Its 14.5-inch barrel profile offers a compact format for appropriate builds while maintaining the familiar handling characteristics of an AR-platform rifle.
The muzzle is threaded 5/8-24, allowing compatibility with properly matched muzzle devices and accessories. This configuration gives builders flexibility when selecting a flash hider, compensator, muzzle brake, or other threaded component designed for the same specification. The barrel is identified as part of the PROOF Research PR15 series, making it a suitable choice for custom rifle projects and replacement applications that require the corresponding chamber and thread pattern.
Part number 143377 provides a straightforward reference when selecting this barrel for a compatible firearm project. As with any barrel installation, confirm receiver, gas-system, handguard, muzzle-device, and ammunition compatibility before use. Professional installation and headspace verification are recommended to support safe and reliable operation. The PROOF Research 143377 PR15 combines a .223 Wylde chamber, a 5/8-24 threaded muzzle, and a compact 14.5-inch configuration in a purpose-built barrel for shooters who value practical compatibility and a streamlined rifle setup.

Features:

• .223 Wylde chamber supports compatibility with .223 Remington and 5.56 NATO ammunition

• 14.5-inch barrel configuration for compact rifle builds

• 5/8-24 threaded muzzle accepts compatible threaded muzzle devices

• PROOF Research PR15 series barrel for custom and replacement applications

• Part number 143377 for accurate product identification