SIG SAUER P320 Fire Control Units are now available. The heart of the pistol, these serialized parts can be combined with a myriad of factory OEM and after market parts from a variety of partners to create a truly custom pistol, with simple hand tools. There’s no need to involve a gunsmith. You can do it all on your own.
Now you can build your dream pistol from the ground up. The Custom Works FCU lets you create like never before. Countless options, endless possibilities.