Primary Weapons UXR Magwell Assembly AR-15 - Model UCRW0004-01-1F

The Primary Weapons Systems UXR Magwell Assembly is a purpose-built AR-15 magwell designed to unlock the full potential of PWS's modular XChange ecosystem. If you're running a rifle platform that rewards flexibility—whether for different hunting scenarios, tactical training, or simply exploring various calibers without buying multiple lowers—this ambidextrous magwell lets you swap magazine types to match your barrel and bolt setup, making it a smart investment in adaptable firepower.

The UXR system is built around the principle that modern shooters shouldn't be locked into a single caliber or magazine platform. This magwell integrates seamlessly with barrels and bolts in .223 Wylde and 300 BLK, with PWS committed to expanding the caliber roster over time. The ambidextrous design means lefties and righties both get ergonomic access to the magazine well—no compromises, no secondary-market workarounds.

Installation into your lower receiver is straightforward, and the magwell's engineering reflects PWS's attention to durability and fit. For shooters building a modular AR or upgrading an existing platform, this is the kind of component that pays dividends as your needs evolve. It's a practical way to future-proof your rifle investment.

Key Features

• Ambidextrous magwell design for both left and right-handed shooters
• Compatible with .223 Wylde and 300 BLK chamberings via XChange system swaps
• Enables caliber-specific magazine type changes without lower receiver swap
• Integrates with the broader PWS UXR XChange ecosystem for long-term modularity
• Engineered for reliable performance across tactical, hunting, and recreational applications

Specifications

Frequently Asked Questions

What calibers does the UXR Magwell Assembly support?

The magwell is compatible with .223 Wylde and 300 BLK at launch. PWS has announced plans to expand the caliber lineup in the future as part of the UXR XChange ecosystem.

Is the UXR Magwell ambidextrous?

Yes. The magwell features an ambidextrous design that accommodates both left and right-handed shooters without requiring separate components or workarounds.

How does the magwell integrate with the XChange system?

The UXR Magwell Assembly works within PWS's XChange platform, which allows you to swap barrels, bolts, and magwells to change calibers and magazine types without replacing the lower receiver. This design is central to the modularity of the UXR platform.

Do I need to buy a new lower receiver to use this magwell?

No. The magwell is designed to install into your existing AR-15 lower receiver and integrates with the XChange system for caliber flexibility.