The PWS UXR Barrel Conversion Kit (brand part no. UXR-CK-223-14) gives AR-15 builders a complete way to switch a rifle over to a .223 Wylde chamber without piecing together individual parts. Primary Weapons Systems chambers this 14.5-inch barrel in .223 Wylde, a hybrid chamber cut that runs both .223 Remington and 5.56 NATO ammunition safely, and pairs it with a 1:8 twist rate suited to a wide range of bullet weights. Sold as a conversion kit rather than a bare barrel, it is built for shooters upgrading an existing AR-15 upper or finishing a new build who want PWS’s barrel quality without sourcing every component separately. PWS has built a reputation on well-finished, reliable AR-15 barrels, and the UXR line carries that same standard into a conversion-ready package.

Key Specifications

• Chambered in .223 Wylde, a hybrid chamber that safely runs both .223 Remington and 5.56 NATO ammunition.
• Measures 14.5 inches in barrel length, a common configuration for carbine-length AR-15 builds.
• Cut with a 1:8 twist rate, stabilizing a wide range of .223/5.56 bullet weights.
• Sold as a conversion kit, bundling the components needed to swap barrels rather than requiring a bare-barrel installation from scratch.
• Built on the UXR platform, Primary Weapons Systems’ barrel and conversion-kit line for the AR-15.
• Manufactured by Primary Weapons Systems, a brand built around AR-15 barrel and gas-system reliability.
• At 14.5 inches, this barrel falls under the federal 16-inch minimum for a rifle, so building it into a complete rifle requires either a permanently attached muzzle device to reach 16 inches overall or registration as a Short-Barreled Rifle.

Frequently Asked Questions

Can this barrel run standard 5.56 NATO ammunition? Yes. The .223 Wylde chamber is designed to safely run both 5.56 NATO and .223 Remington ammunition.

What twist rate does this barrel use? It is cut with a 1:8 twist, which stabilizes a broad range of .223/5.56 bullet weights.

Does this come as a complete kit or just a barrel? It is sold as a conversion kit, bundling the components needed to install the new barrel rather than a bare barrel alone.

Buy the PWS UXR .223 Wylde 14.5-inch Barrel Conversion Kit

Whether you are refreshing a worn-out barrel or building a new upper, this kit gets you PWS quality in a caliber that runs both common .223/5.56 loads. Order the UXR conversion kit from our AR15 barrels selection by Primary Weapons Systems, shipped fast from our Lubbock, Texas gun shop.