Sig Sauer Cal-X Kit P320-M18 9mm Carry Coyote

This Caliber X-CHANGE kit from Sig Sauer converts a manual-safety 9mm P320 into the commercial M18 carry configuration. The kit reproduces the carry-length ergonomics of the P320 M18 and is designed to accept ROMEO-M17 style red dot optics via the SIG-LOC MHS footprint. Included components provide the slide, barrel, grip module, magazines, sights, and recoil assembly needed for the conversion.

Key Specifications

• The caliber is 9mm Luger.
• The barrel measures 3.9 inches.
• The kit includes one 17-round and two 21-round steel magazines.
• The magazine material is aluminum.
• The slide is finished as coyote-tan PVD coated stainless steel.
• The sighting package is a SIGLITE front night sight with a removable rear night sight plate.
• The optic footprint is SIG-LOC MHS (ROMEO-M17 compatible).
• The grip is a coyote-tan standard polymer carry-length module with manual safety.
• The accessory rail is M1913.
• The kit includes a recoil spring assembly.

This Cal-X kit delivers the core components needed to configure a manual-safety P320 as the commercial M18 carry variant with an optic-ready slide and night-capable sights. Its coyote-tan finish and included magazine set make it suitable for shooters seeking a carry-length setup that mirrors the M18 profile while preserving the modularity of the P320 platform.