This lot features a Sig Sauer P320-series Fire Control Unit (FCU), which constitutes the serialized internal chassis for a modular semi-automatic pistol. The unit is equipped with a standard trigger, ambidextrous slide catch/release levers, and the associated internal firing mechanism. As a modular component, it is designed to be compatible with a wide range of Sig Sauer grip modules and slide assemblies across multiple calibers. Key markings include the manufacturer and location SIG SAUER NEWINGTON, NH USA stamped on the right side of the frame. The opposite side bears the serial number 66F625115, along with a small numeral 8 and a circled capital letter I. This item is offered as the fire control unit only and lacks a grip module, slide, barrel, and magazine. Note - All firearms require a federal 4473 background check.

The assembly is in good used condition with a consistent black finish. Light surface wear and thinning of the finish are evident on the upper guide rails and other mechanical contact points. Internal components show traces of white lubricant. The action appears to function correctly with crisp trigger and slide release movements when manually manipulated, though we have not function-tested this unit in a complete firearm configuration.