With it’s unprecedented modularity and unmatched capability, the P320 FCU (Fire Control Unit) platform has become one of the most exciting pistols available to firearms enthusiasts today. The soul of the P320 and the driving force behind its modularity lies in the unique, patented design of its Fire Control Unit (FCU). Now, SIG SAUER is offering the FCU as a standalone product, enabling an entirely new level of customization and personalization, giving users the ability to create virtually milli