Sig Sauer P320 M18 MS 9mm Carry, Coyote PVD, Optics-Ready, 3.9 in Barrel, Ambi Safety, 2x 21rd & 1x 17rd Mags
This Sig Sauer P320 M18 MS is the commercial M18 configuration in 9mm with ambidextrous manual safety and the coyote colorway matching the MHS pattern. It pairs a 3.9 inch compact slide with a carry-length grip module and includes two 21-round extended magazines and one 17-round magazine. The stainless steel slide wears a coyote PVD finish and the modular, serialized FCU underlines the P320 system’s flexibility.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Shows markings from previous handling and use. The rear sight is not present. Please refer to the pictures for a complete view of the condition.
What’s Included
- 2x 21-round factory steel magazines (Made in Italy)
- 1x 17-round factory steel magazine (Made in Italy)
- SIG Sauer factory hard case
- SIG Sauer owner's manual
- Original SIG Sauer factory trigger (uninstalled)
The M18 MS variant delivers the features associated with the MHS pattern: a coyote-finished platform, ambidextrous manual safety, and a compact 3.9 inch slide on a carry-length grip. It is built in the United States and designated under SIG part number 320CA-9-M18-MS.
The slide is stainless steel with a durable coyote PVD finish, and the grip module is coyote polymer. A MIL-STD-1913 4-slot accessory rail on the dust cover supports common duty lights and accessories.
This model is striker-fired with a flat-faced trigger and a standard magazine release. The serialized, modular FCU serves as the legal receiver, allowing component changes within the P320 ecosystem.
The optics-ready slide features a removable rear-sight plate, and it is equipped with a SIGLITE front night sight. This configuration provides a straightforward path to mounting compatible pistol optics.
Capacity is 21+1 with the included extended magazines, and the package also includes a 17-round magazine for a shorter profile. All factory steel magazines are marked "Made in Italy," and the set covers both extended and flush-fit use cases.