Sig Sauer P320 FCU Custom Works — 9/40/357, Black Nitride

Description

This Sig Sauer P320 Fire Control Unit (FCU) is a Custom Works configuration intended as a direct replacement/upgraded FCU for compatible P320 assemblies. The listing identifies a flat, skeletonized trigger and compatibility with 9mm, .40 S&W and .357 SIG P320 post-upgrade accessories. The item is classified by the ATF as a FRAME and is sold as an FFL item (FCU only).

Key Specifications

• The manufacturer is Sig Sauer.
• The product type is a Fire Control Unit (P320 FCU).
• The ATF type is FRAME.
• The ATF manufacturer is listed as SIG SAUER INC..
• The finish is listed as Black Nitride.
• The trigger is a Flat, skeletonized design.
• The unit is compatible with Sig P320 parts and post-upgrade accessories.
• The safety configuration is No Thumb Safety.
• The listed weight is 0.7 lb.

This FCU is aimed at users seeking a factory-compatible Custom Works replacement or upgrade core for the P320 platform. The flat, skeletonized trigger and parts compatibility make it suitable for building or restoring P320 builds that accept post-upgrade components. As an ATF-classified frame item it is supplied as the FCU only and intended for transfer/processing through the proper FFL channels.