SIG Sauer P320-M18 9mm Compact, Manual Safety, Coyote Tan, 3.9 in Barrel, Optics-Ready, 21+1
This P320-M18 is the commercial configuration that mirrors the U.S. military M18 setup, finished in coyote tan with an ambidextrous manual thumb safety and modular polymer grip module. It features a 3.9-inch barrel, factory sights, and an optics-ready slide with a removable rear sight plate. The case label shows a production/pack date of June 6, 2026, and the pistol is marked Newington, NH, USA with slide legend "SIG SAUER M18" and "MFR: 6ZWB1." The serial uses the M18A prefix with a 2D matrix marking.
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: Light scratches and minor finish wear are present. There is light carbon scorching on the dust cover near the accessory rail slots.
What’s Included
- SIG Sauer factory hard case with model/serial label
- Two 21-round magazines
- One 17-round magazine
The compact M18 pattern delivers the P320’s striker-fired system in a duty-proven format with an ambidextrous manual thumb safety. Its modular polymer grip module supports the P320 ecosystem while keeping carry dimensions compact.
The coyote tan slide includes front and rear diagonal serrations for positive manipulation and a removable rear sight plate, enabling direct mounting of compatible optics while retaining the front sight. The rear sight assembly is mounted in the removable plate.
The dust cover integrates a three-slot accessory rail for lights or lasers, and the frame and slide markings reflect U.S. manufacture: the frame is marked Newington, NH, USA; the slide is marked "SIG SAUER M18" with "MFR: 6ZWB1." The case label (M18-9-CSS-MS) indicates "Made in United States" with a date of June 6, 2026.
Capacity is 21+1 with the included extended magazines, and a 17-round magazine is also provided. The overall package matches the commercial P320-M18 specification that aligns with the M18 configuration adopted by the U.S. military.