Sig P320 M18 Ms 9mm 3.9" 10rd Coy Ca

The SIG SAUER P320 M18 Modular Strike Fired 9mm with 3.9-inch barrel is a purpose-built, California-compliant compact pistol engineered for duty-ready performance in professional and civilian defensive carry. This striker-fired, semi-automatic platform ships from the factory with a coyote tan finish, manual thumb safety, and SigLite night sights for low-light target acquisition. As the military-derived variant of SIG's modular P320 system, the M18 represents the scaled-down duty equivalent—optimized for shooters who require a full-featured combat platform in a concealable form factor.

The 3.9-inch barrel length maintains velocity needed for 9mm duty loads while keeping overall profile suitable for appendix or strong-side carry under a shirt. The polymer frame reduces reciprocating mass, managing recoil signature while keeping the unloaded weight at 3.56 pounds—light enough for extended wear without binding or shifting in a quality holster. This P320 M18 variant is optics-ready, accommodating modern red-dot mount systems for those who want to upgrade to a slide-mounted sight. The 10-round magazine capacity meets California legal requirements while providing sufficient ammunition supply for most operational scenarios. Three magazines ship with the firearm, ensuring spare capacity for training or duty rotation.

This configuration is built for law enforcement trainers, military personnel on leave, armed civilians navigating restrictive jurisdictions, and shooters seeking a compact duty pistol with proven modularity and factory night-sight support. The manual safety appeals to operators who train on safety-equipped platforms and prefer that positive mechanical engagement. The coyote tan PVD finish resists corrosion and supports concealment in arid and transitional environments. The P320 M18 Ms platform bridges the gap between duty-grade ergonomics and California-legal constraints without sacrificing reliability or sight picture quality.