This CAL-X conversion kit for the SIG Sauer P320-M18 provides the components required to convert a manual-safety 9mm P320 to the civilian M18 carry configuration. The kit supplies a 3.9-inch coyote-tan PVD-coated stainless steel slide, a coyote-tan carry-length grip module, and three 10-round magazines. It is optic-ready with a SIG-LOC MHS footprint compatible with the ROMEO-M17 (optic not included) and ships with SIGLITE front sight plus a removable night-sight rear plate.
Key Specifications
- The caliber is 9mm Luger.
- The barrel measures 3.9 inches (99.06 mm).
- The kit includes (3) 10rd magazines.
- The slide is a full-size, coyote-tan, PVD-coated stainless steel component.
- The optic-ready footprint is SIG-LOC MHS (ROMEO-M17 compatible).
- The sights are SIGLITE front night sight with a removable night-sight rear plate.
- The grip color is Coyote Tan.
- The kit includes a manual safety on the grip module.
- The accessory rail is M1913.
- The recoil spring assembly and barrel are both included.
This CAL-X kit provides a practical, factory-aligned option for shooters who want to configure a P320 to the M18 carry profile while retaining optic-ready capability. The coyote-tan finish and SIGLITE sighting package present a subdued, utility-focused appearance suited to everyday carry and modular use with ROMEO-M17 compatible optics.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.




