Maxim Defense PDX Upper 300BLK 5.5″ ARID

The Maxim Defense PDX Upper 300BLK 5.5″ ARID is engineered for elite performance with a compact design perfect for tactical use. This upper receiver group, compatible with any Mil-Spec lower, features a 5.5″ barrel in .300 AAC Blackout caliber. Its innovative Maxim HATEBRAKE Muzzle Booster reduces recoil and flash, enhancing effectiveness in close quarters. Designed for precision and reliability, the PDX Upper is the ideal choice when concealment and power are critical.