The Maxim defense PDX U.R.G. is engineered to meet the rigorous demands of the Tier 1 community, delivering uncompromising performance in the most challenging close-quarters environments. Designed for seamless installation on any Mil-Spec lower receiver, this ultra-compact upper receiver group provides a powerful combination of precision, maneuverability and ballistic effectiveness. Measuring just 14 inches in overall length with a compact 5-1/2 inches barrel, the PDX U.R.G. excels in scenarios where concealment and rapid engagement are critical. Equipped with the advanced Maxim HATEBRAKE muzzle booster, this system dramatically reduces recoil, minimizes flash signature and directs gases and concussion downrange enhancing shooter control and maximizing effectiveness in confined spaces. Featuring a reliable Direct Impingement system, the PDX U.R.G. offers a lightweight and streamlined platform designed for mission success. Whether for personal defense, tactical operations or high-performance shooting, this upper receiver group sets a new standard for compact firepower.

The HATEBRAKE is installed under the handguard, providing effective muzzle control to reduce recoil and improve overall firearm handling during rapid firing
M-slot compatible handguard, allowing for easy customization with various accessories while maintaining a lightweight and functional design
Military-grade materials, including 6Al-4V titanium, 17-4 stainless steel, 7075 and 6061 aluminum, ensure maximum strength, corrosion-resistance and durability
The HK height rail offers a more rigid upper receiver, improving the overall stability and accuracy of your rifle for enhanced performance and handling
Maxim Mil-Spec BCG or PDX/SCW compatible BCG, designed for high durability and performance, ensuring a seamless fit and reliable function with specific firearm systems

Report incorrect product description

Reviews

Q & A

Compliance

Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.