SIG Fire Control Units (FCU)

SIG Fire Control Units (FCU)

Explore SIG Fire Control Units (FCUs) and compatible components for the SIG P320 and SIG P365 platforms at Moriarti Armaments. The SIG FCU is the serialized component that allows shooters to customize their handgun with different grip modules, slides, barrels, and accessories while maintaining the same core firearm.

Whether you're building a custom carry pistol, upgrading your current setup, or replacing worn components, you'll find quality P320 FCUs, P365 FCUs, grip modules, slides, barrels, triggers, magazines, and other SIG-compatible parts. Our selection is designed to help you personalize your handgun for concealed carry, competition, recreational shooting, or professional use. Shop premium SIG Fire Control Units and accessories to build the configuration that fits your shooting style.

What is a SIG Fire Control Unit (FCU)?

The SIG Fire Control Unit (FCU) is the serialized operating component used in the SIG P320 and SIG P365 platforms. Because the FCU is removable, shooters can change grip modules, slides, and other compatible components while retaining the same serialized firearm.