The SIG Sauer P365 Custom Works Fire Control Unit (FCU)—the serialized heart of your micro‑compact P365 pistol, now offered as a standalone upgrade. The FCU features an exclusive titanium nitride‑coated frame and flat trigger, paired with a “FC#######” custom serial number. It’s compatible with all P365 9mm and .380 Auto accessories—grip modules, slides, barrels, magazines, optics, you name it—offering virtually limitless personalization for concealed carry enthusiasts
The FCU is the only component that’s legally the firearm itself—buy one and build your custom pistol around it.
-Titanium nitride finish gives you sleek, corrosion‑resistant style and durability
-Choose your own grip, slide, barrel length, optics, and accessories to suit your carry mission
-Part of SIG’s Custom Works Studio: design your dream carry gun, then wait 4–6 weeks for shipping
Whether you’re a fan of modular builds or chasing carry-ready improvements, the P365 FCU is the foundation for a P365 “built by you.”
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