The Maxim Defense PDX U.R.G. is a compact 5.5 inch .300 AAC complete upper receiver group built for mil-spec lower compatibility and direct impingement operation. Engineered for close-quarter use, the PDX U.R.G. combines an HK-height rail, an M-slot handguard interface, and the Maxim HATEBRAKE muzzle booster to help reduce recoil and muzzle signature while directing gases and concussion effects downrange away from the operator.
Key Features
5.5 inch barrel with compact 14 inch overall length for maneuverable performance
Direct impingement operation matched to Maxim PDX U.R.G. configuration
Maxim HATEBRAKE muzzle booster installed under the handguard to improve execution in short-barrel use
HK-height rail for a more rigid upper receiver interface
M-slot compatible handguard mounting interface
Ships with mil-spec BCG and supports Maxim mil-spec BCG or PDX/SCW compatible BCG configurations
If you’re building a compact, mil-spec lower–compatible .300 AAC setup, the Maxim Defense PDX 5.5 inch complete upper delivers the core package in a single ready-to-install configuration.
