SHADOW SYSTEMS SS-3310 XR920 Foundation | 9mm 4″ 17+1

The Shadow Systems SS-3310 XR920 Foundation is a 9mm semi-automatic pistol built on the XR920 Foundation platform with a 4″ barrel and a 17+1 capacity. It ships with a black nitride slide and a threaded barrel, and the slide is cut to accept an optic. This configuration includes two 17-round magazines and green tritium sights as indicated in the model naming.

For optics under $1,000 that pair well with this pistol, consider a compact red-dot such as the Holosun 507C X2 for a low-profile footprint and durable mounting options that match the optic-ready slide.

Common applications for this pistol include everyday carry (EDC) for those who prefer a compact, threaded-barrel platform and competition or range training where optic-ready capability and magazine capacity are valued.

Product Specifications

• Model number is SS-3310 as shown in the product name.
• Chambered in 9mm.
• The barrel measures 4 inches and is threaded.
• Magazine capacity is 17+1.
• The slide finish is black nitride.
• The barrel finish is described as black threaded.
• The pistol is optic ready with a slide cut to accept red-dot optics.
• The package includes two 17-round magazines.
• Standard sights are listed as green tritium in the model naming.
• The frame color is black.
• The action type is semi-automatic.
• The manufacturer’s name is SHADOW SYSTEMS.
• The model designation is XR920 Foundation.
• The product line commonly referred to is Foundation.
• UPC for this item is 810120312378.

The SS-3310 XR920 Foundation is specified for shooters who want a compact, optic-ready 9mm with a threaded barrel and full-sized magazine capacity in a carry-friendly package. Its combination of an optic-ready slide and factory threading makes it a versatile choice for shooters who plan to mount a red-dot and use a suppressor-ready barrel, while the included magazines and tritium sights provide a complete out-of-the-box setup for range work or competition stages.

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