Sig Sauer P320 Custom Works Fire Control Unit (FCU) — Black Nitride

UPC: 798681625970 MPN: Not specified

Sig Sauer P320 Custom Works Fire Control Unit (FCU) is a factory-level component intended for use in compatible P320 platforms. This Custom Works FCU is offered in a black nitride finish and includes a flat, skeletonized trigger blade consistent with the Custom Works Studio styling. The listing references compatibility with 9mm, .40 S&W and .357 SIG configurations and is designed to fit Sig P320 parts and modules post-upgrade. This listing is for the FCU only and is an FFL-transfer item; quantity and availability are subject to transfer and should be confirmed at checkout.

• Caliber: 9mm / .40 S&W / .357 SIG (as listed in manufacturer materials)
• Barrel length: Not specified
• Finish / Material: Black nitride finish (frame finish listed as Black Nitride)
• Capacity / Magazine: Not specified
• Accessory or special feature: Flat face, skeletonized trigger blade
• Action: Semi-Auto (striker-fired FCU style)
• Fit: Designed to fit Sig P320 parts and modules
• Series: Custom Works Fire Control Unit
• Color: Black
• ATF Type: FRAME (FCU is an FFL-transfer item per listing)

Why Choose Sig Sauer

• Sig Sauer heritage: Sig Sauer is a long-established manufacturer known for engineering and consistent parts compatibility across its modular platforms.
• Model advantage: This Custom Works FCU provides a flat, skeletonized trigger and Custom Works finishing and styling intended for advanced customization and compatibility with post-upgrade P320 accessories.
• Condition and listing clarity: This listing specifies the FCU only (FFL item) and highlights fitment for Sig P320 parts so buyers can match components correctly when configuring or upgrading their pistols.

Packaging

The item is listed as the fire control unit only. Packaging typically includes the FCU component packaged for shipment. No additional magazines, slides, barrels, or grip modules are guaranteed with this listing unless explicitly stated. MPN was not provided in supplied data; confirm included items with the seller prior to purchase and note this is an FFL-transfer item.

Why Choose PMA Customs?

• Curated Parts: Every component in a PMA firearm undergoes rigorous inspection and testing. With over a decade of experience, we meticulously select and integrate only quality parts, ensuring unparalleled reliability when it matters most.
• Quality Without Markup: We leverage our manufacturing capabilities and reputable sourcing to deliver exceptional firearms without unnecessary markups. Each product is hand-assembled with stringent quality checks at every stage, guaranteeing superior craftsmanship.
• American Made & Veteran Owned: As a Veteran Owned and Operated business, all PMA Customs firearms are proudly built and assembled in our Georgia facility, utilizing components made here in the USA.

Warranty: All Pickett’s Mill Armory firearms, assemblies, and components are backed by our limited lifetime manufacturer’s warranty!