The Sig Sauer P320 FCU is a complete P320 Fire Control Unit that drops in to the grip module of your choice. Perfect for that custom P320. Exclusive Titanium Nitride Frame Titanium Nitride Skeletonized Trigger Custom "FCU#####" Serial Number Compatible with all 9MM/357Sig/40S&W P320 Post-Upgrade accessories Mfg: Sig Sauer, Inc.
