Sig Sauer P320 M18 CA Compliant | 9mm | 3.9″ | 320CA-9-M18-MS-CA

The Sig Sauer P320 M18 California Compliant is a compact, carry-length variant of the P320 configured to meet California requirements. It ships in coyote tan with SIGLITE night sights, an optic-ready slide with a removable night-sight plate, and three 10-round magazines. For a compatible red-dot under $1,000, consider the SIG Romeo1 PRO, which mounts directly to the M18’s optic-ready footprint.

Applications: everyday carry (EDC) and duty/service or range training. The M18 combines modularity and a carry profile intended for shooters who prioritize a compact, service-style pistol that accepts standard P320 FCU interchangeability.

Product Specifications

• The UPC is 798681691968.
• The manufacturer’s part number is 320CA-9-M18-MS-CA.
• The caliber is 9mm.
• The barrel measures 3.9 inches.
• The capacity per magazine is 10 rounds.
• The pistol includes 3 x 10-round magazines.
• The frame material is stainless steel.
• The grip material is polymer.
• The slide finish is Coyote PVD.
• The overall length is 7.2 inches.
• The weight is 28.1 oz.
• The optic footprint is ROMEO 1.
• The sights are SIGLITE night sights with a removable rear night-sight plate.
• The action is striker-fired, semi-automatic.
• The pistol features a ambidextrous manual safety.

The P320 M18 California Compliant delivers a compact, service-derived package with day/night sighting and an optic-ready slide while meeting state compliance requirements. Its modular P320 fire control unit, carry-sized grip module, and included magazines make it a practical choice for shooters seeking a compact service-pattern pistol with options for optics and standard P320 interchangeability.

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