Sig Sauer P320 Compact X-Change Kit .40 S&W - CALX320C40BSS

The Sig Sauer P320 Compact X-Change Kit in .40 S&W gives you genuine caliber flexibility without buying a second pistol. If you already own a P320 Compact, this kit lets you swap to .40 S&W by exchanging the barrel, slide assembly, grip module, and magazine—a straightforward process that takes advantage of the P320's modular platform. It's a practical solution for shooters who want to experiment with different calibers or adapt their carry gun to different shooting scenarios and preferences.

Installation is simple: disassemble your existing P320 Compact, swap in the X-Change components, and reassemble. No gunsmithing required. This approach is far more economical than maintaining multiple firearms, and it keeps your training and manual-of-arms consistent across calibers since the ergonomics and controls remain identical.

A few details matter: this kit ships with a medium-sized grip frame, regardless of your original configuration. It is not compatible with P320 Compact models equipped with manual safeties, so verify your pistol's safety type before ordering. If you're running a standard P320 Compact, this kit opens up real versatility for practice, duty, or defensive carry in a caliber that suits your needs.

Key Features

• Barrel and slide assembly in .40 S&W
• Grip module included
• Magazine included
• Simple modular swap—no gunsmithing
• Medium-sized grip frame
• Maintains P320 ergonomics and controls across caliber change

Specifications

Frequently Asked Questions

Is this kit compatible with all P320 Compact models?

This kit works with standard P320 Compact pistols, but it is not compatible with P320 Compact models that have a manual safety. Check your pistol's specifications before ordering.

What do I need to install this X-Change kit?

The kit includes the barrel and slide assembly, grip module, and magazine. You simply disassemble your P320 Compact and reassemble it with these components—no additional tools or gunsmithing required.

Can I use my existing P320 Compact magazines with the .40 S&W kit?

The kit includes a magazine for .40 S&W. We recommend using the magazine supplied with the kit to ensure proper function and reliability with the new caliber.

What grip frame size comes with this kit?

This X-Change kit ships with a medium-sized grip frame, regardless of the caliber or your original grip configuration.