Maxim Defense Pdx Pstl 300blk 5.5" 20-Round Pistol

The Maxim Defense PDX Pistol in 300 Blackout with 5.5-inch barrel represents a purpose-built platform for operators and shooters who demand suppressor-ready capability in a compact, maneuverable package. Chambered in .300 Blackout—a cartridge purpose-designed for subsonic performance with suppressors—this 20-round pistol bridges the gap between precision rifle performance and close-quarters handling. Built by Maxim Defense Industries, a manufacturer trusted by professional end-users, the PDX Pistol delivers tactical versatility for home defense, professional applications, and precision shooting scenarios where controlled subsonic velocities and reduced report are mission-critical.

The 5.5-inch barrel provides optimal velocity development for subsonic .300 Blackout ammunition while maintaining a total length of 12.5 inches—critical for vehicle storage, tactical environments, and confined-space operations where a full-length rifle becomes impractical. The integrated threading accommodates standard suppressors, allowing shooters to maximize the ballistic and noise-reduction advantages that make .300 Blackout the preferred cartridge for suppressed operations. At 8.56 lbs, the pistol carries sufficient mass to manage recoil impulse while remaining mobile enough for rapid deployment; the 20-round magazine capacity ensures adequate ammunition for extended engagements without frequent magazine changes, providing a distinct advantage over standard capacity alternatives.

Law enforcement professionals, military-adjacent operators, and civilian shooters invested in suppressor-centric platforms benefit most from this platform. The PDX Pistol integrates seamlessly with standard .300 Blackout ammunition inventories and proven suppressor lineups, eliminating the need for proprietary accessories or non-standard components. This is an FFL-regulated firearm requiring proper licensing, background check, and compliance with all federal, state, and local firearms regulations at point of sale and transfer.