Sig Sauer P320 Full Size X-Change Kit 9mm Luger Handgun, Black (CALX320F9BSS)

The Sig Sauer P320 Full Size X-Change Kit in 9mm Luger is a caliber conversion system that lets you transform your P320 into a different cartridge without buying an entirely new handgun. If you already own a P320 and want to explore other centerfire options, the X-Change kit gives you the flexibility to swap calibers by simply breaking down and reassembling your gun — no gunsmith required. This modular approach makes it a smart investment for shooters who want versatility on the range or in the field.

The kit includes a complete slide and barrel assembly, a grip module, and a magazine tuned for 9mm Luger, all in black. The grip module supplied with this kit is medium-sized, which works across Sig's X-Change lineup regardless of your chosen caliber or barrel length. The X-Change system's core strength is its simplicity: swap the upper receiver group and magazine, and you're running a different round. It's the kind of flexibility that appeals to competitive shooters, hunters who want to match different loads to different game, or anyone curious about how a different caliber performs in the same proven platform.

One important compatibility note: X-Change kits are not compatible with P320 models that have a manual safety. If your P320 has a frame-mounted safety, this kit won't work with it. Make sure you're starting with a standard (non-safety) P320 Full Size before ordering. Otherwise, you're looking at a straightforward modular system that respects the original design and keeps you shooting the gun you already trust.

Key Features

• Complete caliber conversion kit for existing P320 Full Size pistols
• Includes slide/barrel assembly, grip module, and magazine
• Medium grip frame fits across Sig's X-Change caliber options
• Tool-free field disassembly and reassembly
• Centerfire caliber flexibility without purchasing a new handgun
• Black finish

Specifications

Frequently Asked Questions

Is the P320 X-Change kit compatible with my P320 with manual safety?

No. Caliber X-Change kits are not compatible with P320 models that feature a frame-mounted manual safety. They work only with standard P320 Full Size frames without a safety mechanism.

What do I need to already own to use this X-Change kit?

You need an existing P320 Full Size handgun (without manual safety). The X-Change kit supplies the slide/barrel assembly, grip module, and magazine — essentially everything except the fire control unit and frame you already have.

What caliber options are available in the X-Change system?

Sig offers several popular centerfire calibers in the X-Change lineup. This particular kit is chambered in 9mm Luger. Consult Sig Sauer or your retailer for other available caliber options.

What size grip frame comes with this kit?

All Sig Sauer X-Change kits are supplied with a medium-sized grip frame, regardless of caliber or barrel configuration.