Sig Sauer P320 FCU | Custom Works | 9/40/357 | 8900161

The Sig Sauer P320 Custom Works Fire Control Unit (FCU) is a serialized frame component finished in Black Nitride and fitted with a skeletonized flat-face trigger. It is configured for use with 9mm Luger and is listed as compatible with .40 S&W and .357 SIG where compatible P320 modules and parts are used. This FCU is intended for modular pistol customization and competition shooting applications where a performance-oriented trigger and premium finish are desired.

Product Specifications

• The manufacturer is Sig Sauer.
• The model is Fire Control Unit.
• The series is Custom Works Fire Control Unit.
• The fit is Sig P320.
• The caliber/gauge is listed as 9mm.
• The cartridge is 9mm.
• The frame finish is Black Nitride.
• The color is Black.
• The trigger is a Flat style and includes a skeletonized flat blade per product details.
• The action is Semi-Auto.
• The product type is Striker Fired.
• The safety is listed as No Thumb Safety.
• The ATF type is FRAME.
• The ATF manufacturer is SIG SAUER INC..
• The UPC is 798681625970.

This Custom Works FCU provides a direct route to tailor a P320 around your preferences with a high-quality finish and a competition-oriented trigger profile. It suits builders and competitors seeking modularity and refined trigger feel in a serialized FCU package.