Primary Weapons UXR Conversion Kit 300 Blackout 14.5" - U2E14YB01-1F

The Primary Weapons UXR Conversion Kit in 300 Blackout with a 14.5" barrel is purpose-built for shooters who want genuine caliber flexibility without redesigning their entire rifle. Instead of buying multiple complete uppers or platforms, the UXR system lets you swap barrels, bolts, and magwells to transform your rifle for different roles—from suppressed subsonic work to specialized training—all within the same lower receiver.

What sets the UXR apart is the XChange system's practical approach to modular design. Rather than relying on guesswork or complicated tools, Primary Weapons Systems engineered a dot-matching alignment system: line up the dots on your components, and they fit correctly every time. It's the kind of detail-oriented thinking that separates reliable kit from gimmicky one. You get the 14.5" barrel in this kit—a compact length that works well for both handling and velocity in subsonic 300 Blackout loads—along with the matching bolt and magwell required for the conversion.

This is a smart choice if you already run a PWS UXR platform or are planning to build one. The conversion kit approach keeps costs down compared to buying standalone uppers, and it gives you genuine versatility for shooters who actually use different calibers or barrel lengths for different purposes. No hype about "future promises"—just a straightforward way to get more from your rifle setup today.

Key Features

• XChange system enables barrel, bolt, and magwell swaps for caliber conversion
• Dot alignment system ensures proper fit during component changes
• 14.5" barrel length optimized for compact handling and 300 Blackout performance
• Includes barrel, bolt, and magwell—everything needed for the conversion

Specifications

Frequently Asked Questions

What rifle does this conversion kit work with?

This kit is designed for Primary Weapons Systems UXR platform rifles. The XChange system components are engineered to work within the UXR ecosystem.

What's included in the kit?

The conversion kit includes the 14.5" barrel, the matching bolt, and the magwell needed to convert your UXR rifle to 300 Blackout. These three components work together via the dot-alignment system.

How do I switch calibers using the UXR system?

The process uses Primary Weapons' dot system: align the dots on your barrel, bolt, and magwell components, and they fit together correctly. No special tools or complicated steps required—it's designed to be straightforward for field or range use.

Is 300 Blackout good for suppressed shooting?

300 Blackout was designed to perform well with suppressors, especially with subsonic ammunition. The 14.5" barrel length in this kit supports that mission, though ammunition selection and your specific suppressor will affect results.