Sig Sauer P320-M18 MS California Compliant 9mm Compact, 3.9 in Barrel, Coyote PVD Slide, 3x 10-Round Magazines
This Sig Sauer P320-M18 MS is the California-designated compact variant of the P320 series, configured in 9mm Luger with a 3.9 inch barrel and 10+1 capacity. It features a coyote PVD slide, a black polymer grip module with aggressive texture, and an optic-ready slide that retains the rear sight on a removable plate with a SIG ROMEO1Pro footprint. It comes in a SIG factory hard case with three 10-round magazines and both the installed flat-faced trigger shoe and the original curved trigger shoe.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: There are some scratches and blemishes present.
What's Included
- SIG Sauer factory hard case
- Three 10-round SIG Sauer P320 steel magazines (Made in Italy)
- Flat-faced trigger shoe installed
- Original curved trigger shoe (uninstalled, in box)
The P320-M18 MS configuration delivers the ambidextrous manual safety and additional internal safeties listed, aligning this compact 9mm with California-compliant requirements. A loaded chamber indicator is present, with text on the top of the chamber for clear status at a glance. The serialized, modular P320 fire control unit is visible through its FCU window, supporting the platform’s well-known modularity.
The coyote PVD slide provides a durable finish and includes front and rear serrations for confident manipulation. The slide is optic-ready, and its removable rear-sight plate retains the rear sight when the plate is in place. The cut accepts optics using the SIG ROMEO1Pro footprint, giving the owner a straightforward path to mounting a compatible red dot if desired.
This example includes a factory-installed flat-faced trigger shoe for a straight press, and the original curved trigger shoe is included in the box. The striker-fired action pairs with fixed 3-dot sights for a consistent sight picture. Safety features include an ambidextrous manual safety, striker safety, disconnect safety, and a loaded chamber indicator.
Practical details round out the package: a 3.9 inch stainless steel barrel, a 3-slot Picatinny accessory rail on the dust cover, and a black polymer grip module with aggressive texture for secure control. The pistol ships with three 10-round steel magazines marked Made in Italy, and the case label is dated 26-AUG-2023. Country of origin is the United States.