Primary Weapons Systems Uxr 223 Wylde 16'' Barrel Conversion KitPrimary Weapons Systems$499.95
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Primary Weapons Systems
The Primary Weapons Systems UXR 308 Winchester 16" barrel conversion kit brings modular rifle versatility to shooters who want to switch calibers without buying a whole new gun. Built around PWS's XChange system, this kit lets you swap barrel, bolt, and magwell to adapt your rifle to different loads and scenarios—from precision rifle work to hunting to suppressed shooting. It's the kind of practical flexibility that appeals to serious shooters who demand adaptability without the cost or complexity of managing multiple complete rifles.
The XChange system uses an intuitive dot-matching design: line up the corresponding dots on your conversion components, and they fit together correctly every time. No guessing, no fitting and forcing parts that don't belong. The 16" barrel length strikes a balance between handling and velocity, making this kit useful for intermediate-range work and shooting in tighter spaces where a longer barrel becomes unwieldy. Whether you're building a compact rifle, testing a new caliber before committing to a full build, or keeping your platform flexible for changing seasons and game, this conversion approach eliminates the friction of traditional platform hopping.
PWS has designed the UXR ecosystem with expansion in mind, so the caliber and barrel length options are expected to grow over time. If you already own a UXR upper or are building one, this 308 Winchester conversion kit turns your rifle into a multi-caliber platform without reinvesting in a complete new firearm.
| Caliber | 308 Winchester |
| Barrel Length | 16" |
| System | PWS XChange |
| Components Included | Barrel, bolt, magwell |
This kit is designed for Primary Weapons Systems UXR platforms that use the XChange system. You'll need a compatible UXR upper receiver and lower to use this conversion kit.
The XChange system uses a dot-matching design. Simply align the corresponding dots marked on the barrel, bolt, and magwell, and the components will fit together correctly every time.
The kit includes the 308 Winchester barrel, bolt, and magwell—everything you need to convert a compatible UXR platform to 308 Winchester caliber.
Primary Weapons Systems plans to expand the UXR catalog with additional caliber options and barrel lengths in the future. Check back for updates on 308 Winchester availability in other lengths.
Primary Weapons Systems
The Primary Weapons Systems UXR 308 Winchester 16" barrel conversion kit brings modular rifle versatility to shooters who want to switch calibers without buying a whole new gun. Built around PWS's XChange system, this kit lets you swap barrel, bolt, and magwell to adapt your rifle to different loads and scenarios—from precision rifle work to hunting to suppressed shooting. It's the kind of practical flexibility that appeals to serious shooters who demand adaptability without the cost or complexity of managing multiple complete rifles.
The XChange system uses an intuitive dot-matching design: line up the corresponding dots on your conversion components, and they fit together correctly every time. No guessing, no fitting and forcing parts that don't belong. The 16" barrel length strikes a balance between handling and velocity, making this kit useful for intermediate-range work and shooting in tighter spaces where a longer barrel becomes unwieldy. Whether you're building a compact rifle, testing a new caliber before committing to a full build, or keeping your platform flexible for changing seasons and game, this conversion approach eliminates the friction of traditional platform hopping.
PWS has designed the UXR ecosystem with expansion in mind, so the caliber and barrel length options are expected to grow over time. If you already own a UXR upper or are building one, this 308 Winchester conversion kit turns your rifle into a multi-caliber platform without reinvesting in a complete new firearm.
| Caliber | 308 Winchester |
| Barrel Length | 16" |
| System | PWS XChange |
| Components Included | Barrel, bolt, magwell |
This kit is designed for Primary Weapons Systems UXR platforms that use the XChange system. You'll need a compatible UXR upper receiver and lower to use this conversion kit.
The XChange system uses a dot-matching design. Simply align the corresponding dots marked on the barrel, bolt, and magwell, and the components will fit together correctly every time.
The kit includes the 308 Winchester barrel, bolt, and magwell—everything you need to convert a compatible UXR platform to 308 Winchester caliber.
Primary Weapons Systems plans to expand the UXR catalog with additional caliber options and barrel lengths in the future. Check back for updates on 308 Winchester availability in other lengths.