Sig Sauer P320X FCU 9mm

Updated August 24, 2026

This SIG Sauer P320 X-Series Fire Control Unit is marked for the modular P320 family and is associated with 9mm configurations. Serial number 58C189454, this serialized assembly remains in very good overall condition and features the desirable flat X-Series trigger. As offered, this lot consists of the FCU rather than a complete pistol, so no barrel, slide, grip module, sights, or magazine are included unless shown in the photographs. The removable fire-control unit is the defining feature of the P320 platform and serves as the serialized core around which compatible handgun configurations can be assembled. SIG Sauer’s modular approach helped make the P320 one of the most significant modern pistol designs in the company’s lineup, with the X-Series bringing upgraded trigger and ergonomic concepts to the platform. FFL transfer is required. A clean serialized foundation for the dedicated SIG Sauer enthusiast. Please see photos. Sig Sauer P320X FCU 9mm Semi 58C189454 Very Good

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