Maxim Defense MXM50841 PDX 505-SPS | 5.56 | 5.50″

The Maxim Defense PDX 505-SPS (MXM50841) is a compact AR-platform pistol finished in Urban Grey and built around Maxim’s SCW Pistol System in place of a stock or brace. The SCW Pistol System is the most streamlined rear solution offered, weighing approximately 5.3 ounces and reducing bulk compared to the SCW stock while providing a rear QD swivel mount for an over-the-shoulder sling. This semi-automatic pistol ships optic-ready and is chambered for .223 REM/5.56 NATO in a 5.50″ barrel configuration. Consider pairing it with the Vortex Venom 3 MOA red dot (priced under $1000) for a low-profile, fast-acquisition optic that complements the pistol’s compact handling.

Product Specifications

• The manufacturer is Maxim Defense Industries.
• The model is MXM50841 PDX 505-SPS.
• The caliber is .223 REM/5.56 NATO.
• The barrel measures 5.50″.
• The capacity is 20 + 1.
• The action is Semi-Auto.
• The overall length is 18.75″.
• The listed weight is 5.10 lbs.
• The weight range is 5 lbs to 5.99 lbs.
• The firearm uses a Synthetic stock material.
• The pistol is Optic Ready for a variety of red dots and scopes.
• The grip material is Urban Grey Polymer.
• The barrel length range is 5″ to 5.99″.
• The finish is Urban Grey Metal.
• The UPC is 680017508418.

With its short 5.50″ barrel, compact overall length and Slim SCW Pistol System, the PDX 505-SPS is a practical choice for close-range course work, competitive PCC-style matches, and range training where compact handling and sling compatibility matter. Its optic-ready top and reduced rear profile make it straightforward to outfit for fast target acquisition without adding unnecessary bulk.

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