SKU: SIGCALX320C9BSS10
UPC: 798681511488
MPN: CALX320C9BSS10
The SigArms Caliber X-Change Kit transforms any compatible P320 fire control unit into a compact 9mm configuration. This complete conversion package includes everything needed for the swap: a finished slide assembly with factory-installed SIGLite night sights, a 3.9-inch barrel, recoil spring with guide rod, polymer grip module, and a 10-round magazine. For P320 owners who want to run multiple calibers or frame sizes without purchasing separate handguns, this kit delivers the modularity that made the P320 platform famous.
The slide features SIG's Black Nitron finish over stainless steel, providing corrosion resistance and a low-reflective surface suitable for duty or concealed carry. A 5.8-inch sight radius pairs with the tritium SIGLite night sights for consistent target acquisition in varied lighting conditions. The slide is reflex optic compatible, allowing future mounting of red dot sights without permanent modification. The included polymer grip module accepts the P320 fire control group directly, and the complete recoil spring assembly ensures reliable cycling with standard 9mm loads. Note that this kit is not compatible with P320 models equipped with manual safeties. All components install without gunsmith intervention using SIG's tool-free takedown system.
This conversion kit suits shooters who train with different configurations or want a compact carry option from their full-size P320. Swap to the 9mm compact setup for concealed carry, then return to your original caliber for range work or competition. The 10-round capacity meets restricted-state requirements while maintaining a flush-fit profile. Browse our magazines for additional P320-compatible options, or explore SIG holsters sized for the compact frame.
The kit includes a complete slide assembly with pre-installed SIGLite night sights, a 3.9-inch 9mm barrel, recoil spring and guide rod, polymer compact grip module, and one 10-round magazine. All components needed for conversion are included.
No, this Caliber X-Change Kit is not compatible with P320 models equipped with manual safeties. It is designed for standard P320 fire control units without the manual safety feature.
Yes, the slide is reflex optic compatible. This allows you to mount compatible miniature red dot sights for faster target acquisition without requiring permanent modification to the slide.
No special tools are required. The P320 platform uses a tool-free takedown system. Remove your existing fire control unit and reassemble it with the X-Change Kit components following standard P320 disassembly procedures.
The slide features SIG's Black Nitron finish applied over stainless steel. This finish provides corrosion resistance and a non-reflective matte black appearance suitable for tactical and everyday carry applications.
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