The Sig Sauer P320 Custom Works Fire Control Unit (FCU) is a factory-level replacement and upgrade component designed for the modular P320 platform. This FCU pairs a Black Nitride finish with Titanium Nitride treatment on the frame and includes a flat, skeletonized trigger designed for a consistent interface. It is intended for use with Sig P320-compatible parts and is listed for 9mm Luger, .40 S&W and .357 SIG configurations.
Key Specifications
- The manufacturer is SIG SAUER INC..
- The model is the Fire Control Unit for the P320 platform.
- The exterior finish is Black Nitride.
- The frame treatment is Titanium Nitride.
- The trigger is a flat, skeletonized profile.
- Compatible calibers are 9mm / .40 S&W / .357 SIG.
- The product type is listed as Striker Fired / Stripped Fire Control Unit.
- The ATF classification is FRAME.
- The safety configuration is No Thumb Safety.
- The listed weight is 0.7 lb.
Designed for modularity and precise fitment, this FCU supplies a durable core component for custom P320 builds or repairs. Its premium finishes and refined trigger profile provide a clean, consistent interface for shooters focused on reliable operation and controllability.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.
