SIG Sauer P320-M18 9mm Compact — Coyote-Tan, Optics-Ready, 3.9 in Barrel, 2x 21-Rd & 1x 17-Rd Mags
The SIG Sauer P320-M18 is the commercial counterpart to the U.S. military's M18 Modular Handgun System, combining compact 9mm performance with duty-ready features. This example comes optics-ready with a removable rear sight plate, includes two 21-round magazines and one 17-round magazine, and sports a coyote-tan slide and grip module with black controls. It retains the P320’s modular FCU design and ambidextrous controls in a carry-friendly 3.9 in configuration.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are some scuffs and scratches on the slide and frame.
What’s Included
- SIG Sauer factory hard case
- SIG Sauer owner's manual/documentation
- Two 21-round steel magazines (made in Italy)
- One 17-round steel magazine (made in Italy)
This P320-M18 features a coyote PVD slide and matching coyote-tan polymer grip module, paired with black controls for a clean, duty-style look. The slide includes front and rear serrations for positive manipulation and a pop-up loaded-chamber-indicator slot ahead of the rear sight plate.
It is optics-ready with a removable rear sight plate compatible with the ROMEO1Pro/DeltaPoint Pro footprint. Fixed 3-dot sights are installed, with a dovetailed front blade and a rear sight integrated into the removable plate.
The compact, striker-fired system uses a 3.9 in steel barrel and the modular P320 serialized FCU in the M18 format. Ambidextrous manual thumb safety and internal striker/firing safeties provide layered safety features, and ambidextrous slide catch levers support left- or right-handed operation.
A 3-slot Picatinny accessory rail on the dustcover supports common lights or lasers. Capacity is 21+1 with the extended magazines, and 17+1 with the flush-length magazine. This pistol is marked NEWINGTON, NH USA and aligns with the military M18 configuration for a familiar, proven setup.