The Sig Sauer P320 X-Compact is a striker-fired 9mm Luger pistol with a 3.9-inch barrel, 15-round capacity, and a stainless steel slide over a lightweight polymer frame. Total weight is 1.6 lbs. The slide is optics-ready and ships with XRay3 night sights. 
 

Key Specifications 

• UPC: 798681656165 
• Caliber: 9MM Luger (9x19 Para) 
• Action: Striker 
• Capacity: 15 rounds 
• Barrel Length: 3.9 inches 
• Weight: 1.6 lbs 
• Finish: Black 
• Slide Material: Stainless Steel 
   

Features 

The P320 platform uses a removable serialized fire control unit, so the frame and slide can be swapped independently. This X-Compact configuration sits between a full-size and a subcompact — short enough for carry but long enough to get a full grip. The striker mechanism delivers a consistent trigger pull on every shot without requiring a manual safety. 
 
XRay3 night sights use a tritium front dot with a contrasting green ring, giving good low-light visibility without an optic. The optics-ready cut accepts direct-mount red dots through the appropriate adapter plate. At 1.6 lbs unloaded the gun is light enough for all-day carry without becoming unpleasant to shoot. 
 
15 rounds in a compact frame is a competitive capacity for the class. Sig's modular design also means aftermarket grip modules in different sizes are widely available.

Owner sentiment on the P320 X-Compact Spectre runs strongly positive. Ergonomics come up most often — the grip geometry and the ability to swap modules let shooters fit the gun to their hand rather than adapting their grip to the gun. The consistent striker trigger gets credit for improving accuracy during faster strings.

The optics-ready cut is a genuine selling point for owners who run red dots. XRay3 sights get favorable marks for low-light use. Build quality and reliability are rarely questioned — the platform has a long track record across military and law enforcement use.

Price and comparisons to competitors like Glock and the M&P are the most common conversation topics. Some buyers feel the Spectre finish commands a premium over the standard X-Compact that isn't fully justified by performance alone. Aftermarket support is strong — holsters, slides, triggers, and optic plates are widely available.