Sig Sauer P320X Full 9mm

Updated August 24, 2026

This SIG Sauer P320 X-Full semi-automatic pistol is chambered in 9mm and presents in new-in-box, unfired condition, making it an especially attractive example of SIG Sauer’s popular X-Series platform. Serial number 58J359598, this pistol features an approximately 4.5" barrel with an unfired bore, a full-size X-Series polymer frame with aggressively textured synthetic grip surfaces, and a steel optic-cut slide. Adding considerably to the package is a SIG Sauer ROMEO red dot sight, providing a factory-compatible electronic sighting solution that complements the pistol’s performance-oriented design. Three magazines and the original SIG Sauer hard case are included. The modular P320 has become one of SIG Sauer’s most important modern handgun designs, while the X-Series builds upon the platform with enhanced ergonomics and competition-inspired features. With its unfired condition, ROMEO optic, three magazines, factory case, and full-size configuration, this is an outstanding P320 package with excellent collector and shooter appeal. Please see photos. Sig Sauer P320X Full 9mm Semi 4.5 Unfired 58J359598 New in Box

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