Description
The Authentic P365-RAINBOW 380 is a factory-original, serialized FCU (Fire Control Unit) from SIG Sauer. This complete internal chassis is the legal firearm component for the P365 platform, finished in a vibrant, multi-color PVD coating. Crafted from stainless steel, it serves as the core for building a custom micro-compact pistol. It is designed for direct compatibility with SIG P365 grip modules and slides chambered in .380 Auto.
Key Features
- Factory-Original SIG Sauer FCU with Serial Number
- Stainless Steel Construction with Durable PVD Rainbow Finish
- Complete Fire Control Unit – The Legal Firearm Component
- Direct Drop-In Compatibility with P365 .380 Grip Modules & Slides
- Enables a Custom, Personalized Micro-Compact Pistol Build
Specifications
| Caliber / Type | .380 Auto Fire Control Unit (FCU) |
|---|---|
| Material | Stainless Steel |
| Finish | Multi-Color Physical Vapor Deposition (PVD) |
| Compatibility | SIG Sauer P365 Platform (.380 Auto) |
| Weight | Approx. 3.3 oz (FCU only) |
This FCU is the serialized heart of the SIG P365, a proven micro-compact design. The .380 Auto chambering offers reduced recoil compared to 9mm, aiding in controllability for the shooter. The PVD coating provides exceptional hardness and corrosion resistance, ensuring the internal components maintain reliability. This unit allows for a personalized build while retaining SIG Sauer’s factory-engineered trigger and safety mechanisms.




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