SIG SAUER FCU 320 FRAME 9/40/357 BLACK

The Sig Sauer P320 Fire Control Unit (FCU) is a serialized, modular core component designed for the P320 pistol system, enabling users to build fully customized handguns by pairing it with compatible slides, barrels, grip modules, and accessories. Featuring an exclusive titanium nitride or black DLC finish, a skeletonized flat trigger, and compatibility with 9mm, .357 SIG, and .40 S&W calibers, the FCU serves as the foundation for competition, duty, or personal defense builds. Its serialized nature ensures traceability while supporting Sig Sauer's Custom Works ecosystem for enthusiasts seeking premium performance and adaptability.