Sig Sauer CAL-X Kit | P320-M18 9mm | Coyote Tan

This CAL-X conversion kit converts a manual-safety 9mm P320 into the civilian P320-M18 carry configuration and provides an optic-ready slide with the SIG-LOC MHS / ROMEO-M17 footprint. It pairs well with compact reflex sights; consider the SIG Sauer ROMEO-M17 reflex sight, a compact optic commonly priced under $1,000 that matches the footprint on the slide. The kit is targeted at users who want a carry-length configuration with modularity for optic mounting and reliable range performance.

Recommended applications: everyday carry (EDC) and duty-style qualification / range training.

Product Specifications

• The kit configures a manual-safety 9mm P320 to the civilian P320 M18 carry configuration.
• The caliber is 9mm Luger.
• The barrel measures 3.9 inches.
• The barrel is not threaded.
• The kit includes three 10-round steel magazines.
• The magazine material is aluminum.
• The slide is a full-size 3.9-inch PVD-coated stainless steel in coyote tan.
• The sighting system includes a SIGLITE front night sight and a removable rear night sight plate.
• The grip module is a coyote-tan carry-length grip.
• The recoil spring assembly is included.
• The slide accepts SIG-LOC MHS / ROMEO-M17 reflex optics (optic not included).
• The accessory rail is M1913 (Picatinny).
• The pistol is equipped with a manual safety.
• The grip material is standard polymer.
• The UPC is 798681723980.

This complete CAL-X kit supplies the core components needed to convert a compatible manual-safety P320 into the civilian P320-M18 carry configuration. It delivers a coyote-tan carry-length module, a PVD-coated stainless slide with an optic-ready footprint, and three service-capacity magazines—making it a practical choice for shooters who value modularity, straightforward maintenance, and immediate optic compatibility for a reflex sight such as the ROMEO-M17.