Description
The Order M18 is a premium, factory-direct P320 FCU (Fire Control Unit) from Sig Sauer. This serialized chassis forms the legal heart of the modular P320 platform, constructed from a durable stainless steel frame with a Nitron finish. It provides the core trigger group and fire control mechanism, allowing you to build a custom pistol by adding your choice of grip module, slide, and barrel. This is the essential starting point for a personalized duty or competition build.
Key Features
- Genuine Sig Sauer M18 P320 Fire Control Unit (FCU)
- Stainless steel construction with corrosion-resistant Nitron coating
- Factory-original trigger with smooth, consistent pull
- Serialized chassis for legal firearm assembly and registration
- Full compatibility with the vast P320 aftermarket ecosystem
Specifications
| Caliber / Type | 9mm Fire Control Unit (FCU) |
|---|---|
| Material | Stainless Steel |
| Finish | Nitron |
| Compatibility | Sig Sauer P320 platform |
| Weight | Approx. 7.5 oz |
The Sig Sauer P320 FCU is a machined, drop-in fire control group. Its design centralizes the trigger, sear, and safety mechanisms into a single chassis, a key innovation for modularity. This 9mm FCU meets U.S. military specifications for the M17/M18, ensuring proven reliability. It must be assembled with a compatible grip module, slide, and barrel to function as a complete firearm, adhering to all ATF regulations.




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