The Maxim Defense PDX 505-SPS represents a precision-engineered advancement in the compact AR Pistol segment. This variant integrates Maxim’s specialized SCW Pistol System, optimizing the platform for minimal footprint and enhanced maneuverability without compromising the inherent reliability expected from the PDX series. Engineered for experienced operators and competitive shooters requiring a highly portable yet capable firearm, the 505-SPS maintains critical functionality in a streamlined package.
Key Features
Integrated SCW Pistol System
The PDX 505-SPS is distinguished by the Maxim Defense SCW Pistol System. This proprietary design delivers the most streamlined AR Pistol backend available, devoid of external angles that could impede deployment or handling. Weighing a mere 5.3 ounces, the SCW Pistol System significantly reduces overall firearm weight, shaving over 10 ounces compared to the standard SCW Stock. This system incorporates a rear single-point QD swivel mount, providing a secure and ergonomically positioned attachment point for sling integration, which can aid in shot stabilization.
Optimized Compact Design
Retaining the established reliability and compact dimensions of the PDX lineage, the 505-SPS is purpose-built for scenarios demanding discretion and rapid deployment. The reduced form factor, combined with the lightweight SCW Pistol System, contributes to improved operational agility.
Robust Construction
Constructed with a durable black metal finish and equipped with a resilient black polymer grip, this AR Pistol is designed to withstand rigorous operational demands, ensuring consistent performance across diverse environmental conditions.
Technical Specifications
- Brand: Maxim Defense
- Model: MXM50803 PDX 505-SPS
- Caliber: 5.56x45mm NATO
- Barrel Length: 5.50 inches
- Capacity: 20+1 Rounds
- Finish: Black Metal
- Grip Material: Black Polymer
- System: SCW Pistol System (5.3 oz, includes rear single point QD swivel mount)
- Product Category: AR Pistol









