Sig Sauer P320 Fire Control Unit 9mm/40/357

The Heart of Your Custom P320

The Sig Sauer P320 Fire Control Unit represents the core of one of modern shooting sports' most adaptable platforms. This FCU (Fire Control Unit) is the regulated component that allows you to build or customize a P320 to your exact specifications.

Premium Construction

Titanium Nitride Finish provides superior corrosion resistance and durability compared to standard finishes. The skeletonized flat-blade trigger reduces weight while maintaining the crisp, predictable break that P320 shooters expect.

Versatile Caliber Compatibility

This FCU works seamlessly with:

• 9mm Luger
• .40 S&W
• .357 Sig

Simply swap grip modules and slides to change calibers—no FCU replacement needed.

Build Your Perfect Pistol

The P320 platform offers thousands of configuration possibilities. Pair this FCU with your choice of:

• Grip modules (compact, carry, full-size)
• Slides and barrels
• Optic-ready configurations
• Custom finishes and accessories

Important Note

This is a Fire Control Unit only. It is a regulated firearm component and requires proper federal licensing and compliance with all applicable laws.

Whether you're a competitive shooter, defensive pistol enthusiast, or someone who simply values modularity and customization, this FCU gives you the foundation to build exactly the pistol you need.