Maxim Defense's compact PDX 505-SPS in 300 Blackout features a streamlined SCW Pistol System, 5.50" barrel, 20+1 capacity, and Arid Brown finish for reliable, lightweight performance.
Maxim Defense has refined the compact AR pistol concept with the PDX 505-SPS, chambered in 300 Blackout. This firearm delivers the same reliability you expect from Maxim's engineering, but with a focus on streamlined, no-nonsense functionality.
The PDX 505-SPS represents thoughtful engineering. By eliminating unnecessary protrusions, Maxim created a pistol that moves cleanly through tight spaces and won't catch on gear. The rear QD mount placement shows the designers understand how shooters actually use these tools—whether for precision work with a sling or rapid deployment.
This is a firearm built for those who value substance over flash.