SIG Sauer P320-M18 9mm Compact, Optic-Ready, Coyote-Finish Semi-Auto Pistol
The SIG Sauer P320-M18 brings the U.S. military’s M18 service pistol to the civilian market in the same coyote-tan finish, with a modular fire-control unit and optic-ready slide. This compact, striker-fired handgun accepts full-size 21-round magazines, includes night sights, and ships with a Streamlight TLR-1 HL weapon light—giving buyers a ready-to-run defensive setup right out of the box.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Specific Condition Notes: The frame and slide exhibit minor scuffs and wear, but all controls operate smoothly and the pistol appears to function properly.
Bore Condition: Good – clean, well-maintained, with only minor wear marks.
Bore Rifling: Good Rifling – intact, well-defined lands and grooves.
What’s Included
- SIG Sauer P320-M18 9mm pistol
- 1 × 21-round SIG Sauer steel magazine with orange follower
- 1 × 17-round SIG Sauer steel magazine with orange follower
- Streamlight TLR-1 HL weapon light (mounted)
- Soft case
The P320-M18 is the commercial version of the sidearm adopted by every branch of the U.S. Armed Forces. Its serialized, stainless-steel fire-control unit is modular, allowing shooters to swap grip modules, slides, and barrels to change size or caliber without replacing the entire gun.
An optic-ready coyote PVD slide accepts SIG ROMEO1 PRO and Leupold DeltaPoint Pro footprints. Front and rear cocking serrations, an external extractor, and a loaded-chamber viewport add functional touches aimed at duty reliability.
The 3.9-inch carbon-steel barrel wears a nitride treatment for corrosion resistance. Paired with the striker-fired action, ambidextrous manual safety, striker and disconnect safeties, and reversible magazine release, the M18 offers modern safeguards while remaining intuitive for both right- and left-handed users.
SIGLITE tritium night sights provide a bright, three-dot sight picture in low light. A three-slot MIL-STD-1913 rail sits ahead of the trigger guard and comes outfitted with a Streamlight TLR-1 HL, delivering 1,000 lumens for target identification.
Despite its compact dimensions, the grip module accepts the included 21-round magazine for maximum on-board capacity; a flush-fit 17-round magazine is also supplied for easier concealment.