SIG Sauer P320-M18 MS 9mm Carry, Coyote PVD, SIGLITE Night Sights, Optics-Ready, 3.9 inch Barrel, 21+1
This SIG Sauer P320-M18 MS is the commercial analogue of the U.S. military M18, finished in coyote PVD with a 3.9 inch barrel and ambidextrous manual safety. It is optics-ready under a removable rear sight plate and comes with SIGLITE night sights. The pistol includes two 21-round magazines and one 17-round magazine, a factory case, owner’s manual, and a packaged M18 patch. The case label is dated 14-Jan-2022, and magazines are marked Made in Italy.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minimal handling marks are present from prior use. Please refer to the photos for close-ups.
What’s Included
- SIG Sauer factory hard case
- SIG Sauer owner’s manual
- M18 patch (packaged)
- Two 21-round steel magazines (Made in Italy) with polymer baseplates
- One 17-round steel magazine (Made in Italy) with polymer baseplate
The P320-M18 MS mirrors the configuration adopted under the Modular Handgun System, pairing a coyote PVD slide with a coyote tan polymer Carry grip module. The pistol is marked NEWINGTON, NH, USA and built on SIG’s modular fire control unit.
The slide features front and rear serrations and is optics-ready with a PRO footprint under a removable rear sight plate. A loaded-chamber viewport and SIGLITE tritium night sights (front dot and two-dot rear plate) provide practical, low-light visibility.
The striker-fired system uses a standard curved trigger, and controls include ambidextrous manual safety levers and bilateral slide-catch levers. A MIL-STD-1913 accessory rail with three cross-slots is integrated for light or laser attachment.
The 3.9 inch carbon steel barrel and carry-size configuration make this M18 variant well balanced. It ships with two 21-round magazines and one 17-round magazine; capacity is listed at 21+1. The steel magazines are stamped Made in Italy and use polymer baseplates.
Documentation details include a case label dated 14-Jan-2022. The FCU serial visible through the grip window matches the case-label serial, aligning the pistol with its factory packaging.