Sig Sauer P320 Custom Works FCU Fire Control Unit, Black

In stock
as of 02/28/2024 10:28AM CST
Store Inventory
Available OnlineMore than 10
Fountain Valley, CAOut of stock
The Colony, TXMore than 10
SKU: SG-8900161
MPN: 8900161
UPC: 798681625970

Not for sale in California, Click here for details.

Inter-Store Transfer

If this item is out of stock at your local RifleGear but available at our other location, no problem. Just place your order and select In-Store Pickup as the shipping method. As long as the item is legal in your location, we will transfer the item for you. You will be notified by email once your item has arrived at the destination.

The SIG P320 Custom Works Fire Control Group(FCU) is the heart of the modular P320 platform. The P320 is perfectly suited to adapt to the users demands. The P320 can be configured with various slides, barrels, grip modules and magazines. The SIG Custom Works FCU features a Black PVD finished frame, Black PVD finished skeletonized trigger, custom FCU serial number. Compatible with all 9mm/357SIG,40SW P320 Post-Upgrade accessories.

*Please understand your state/local laws prior to ordering.

California Notes: Can only be sold as a CA Off Roster Handgun to exempt Law Enforcement Officers.

Black PVD Finish
Black PVD Skeletonized Trigger
Custom "FCU######" Serial Number
Compatible with all 9mm/357SIG/40SW P320 Post-Upgrade accessories

Not for sale in California, Click here for details.

Important note about our photos
While we make every effort to ensure that our product photos are accurate, manufacturers occasionally change the design of components such as triggers, sights, or magazines without notice. Also, modifications to the firearm or component may be required in order to meet specific state compliance requirements. While we make every effort to accurately describe and illustrate the item you are going to receive, there may be visual differences on various components that do not affect functionality.

Federal law requires that you be 21 years of age or older to purchase a handgun, frame or receiver. To purchase a shotgun or rifle, you must be 18 years of age or older. 18 U.S.C. Section 922(b)(1).

As required by federal law, this item may only be shipped to a dealer with a valid Federal Firearms License. If you do not specify the name and shipping address of your dealer, your order will be delayed.
 Click here for more information on buying a gun online.  

California Residents
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to


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