Sig Sauer Custom Works P320 FCU Fire Control Unit


5 in stock (can be backordered)



***This is a FFL item and can only be shipped to a dealer.  No shipments to California. ***

From the beginning, the P320 was built to be a pistol that could adapt to meet the user’s specific needs. From grip modules and magazines to custom slides, barrels, and optics, the P320 can be configured in thousands of different ways to make your P320 unique and exactly the pistol you are looking for.

The P320 CustomWorks Studio FCU program takes that idea and brings it to an unprecedented new level. Take a look at the video to get a more in-depth overview of what this program has to offer. You can also click one of the buttons above to either start building your custom P320 or to purchase your CustomWorks P320 FCU.

  • Exclusive Titanium Nitride Frame
  • Titanium Nitride Skeletonized Trigger
  • Custom “FCU######” Serial Number
  • Compatible with all 9mm/357SIG/40SW P320 Post-Upgrade accessories
  • Build a custom P320 with a full line of performance parts and accessories at

This is considered a firearm, it will need to be transferred through a Federal Firearms Dealer.


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