The Maxim Defense PDX 505-SPS delivers rifle-caliber performance in an ultra-compact platform designed for close-quarters applications. This 5.56x45mm NATO firearm combines the stopping power of a rifle cartridge with the maneuverability of a pistol-format system.
What Makes This Different
Built around Maxim Defense's proprietary short-stroke piston system, the PDX 505-SPS operates reliably with minimal gas blowback compared to direct impingement systems. The 5.5-inch barrel utilizes advanced metallurgy and rifling to maximize velocity retention from the compact platform. Factory testing shows consistent sub-2 MOA accuracy at 100 yards with quality ammunition.Key Features
- 5.56x45mm NATO chamber accepts both 5.56 NATO and .223 Remington ammunition
- Short-stroke piston operating system reduces fouling and heat transfer
- 20-round magazine capacity with STANAG 4179 compatibility
- Urban Grey Cerakote finish provides corrosion resistance and reduced visibility
- M-LOK compatible handguard allows modular accessory mounting
- Ambidextrous controls accommodate left and right-handed operators
- Adjustable gas block optimizes function with suppressed and unsuppressed fire
Technical Specs
- Caliber: 5.56x45mm NATO/.223 Remington
- Barrel Length: 5.5 inches, 1:7 twist rate
- Overall Length: 20.25 inches
- Weight: 5.2 pounds (unloaded)
- Magazine Capacity: 20+1 rounds
- Operating System: Short-stroke piston
- Finish: Urban Grey Cerakote on metal components
- Grip: Urban Grey polymer construction
- Rail System: M-LOK compatible aluminum handguard
- Country of Origin: United States
