This Sig Sauer P320 semi-automatic pistol fire control unit (FCU) serves as the serialized component and legal firearm of the modular P320 handgun system, designed for multi-caliber compatibility. The unit is constructed with a black finish over a stainless steel frame and comes equipped with a curved trigger, sear assembly, and ambidextrous slide catch levers. Key markings include the manufacturer and location on the right side, transcribed verbatim as SIG SAUER / NEWINGTON, NH USA. The left side bears the serial number 66E925623 along with smaller stampings including the number 11 and a circled T character. As this is a standalone fire control unit, it is offered without a slide, barrel, or grip module. Note - All firearms require a federal 4473 background check.

The component is in good overall condition, showing minor signs of previous use and handling. The black finish remains largely intact across the frame and control surfaces. There is visible white lubricant within the internal channels consistent with standard maintenance. The trigger and sear mechanisms appear to function correctly when manipulated, and the slide catch levers move freely. We have not function-tested this firearm.