Sig Sauer P320 M18 Compact 9mm Luger – Coyote-Tan, Optic-Ready, 3.9" Barrel, 10+1 Capacity
The P320 M18 brings the U.S. military’s Modular Handgun System to civilian shooters in a compact, state-compliant package. Finished in matching coyote-tan and equipped with tritium night sights, this striker-fired pistol features a modular fire-control unit, optics-ready slide, and ambidextrous manual safety. Its 3.9-inch barrel, carry-length grip, and included 10-round magazines make it well-suited for duty, defense, or range use.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent - Sharp lands and grooves.
Specific Condition Notes: Some mild wear is visible on contact surfaces, but the pistol remains in great shape overall.
What’s Included
- SIG Sauer factory plastic case (gray)
- Three 10-round steel SIG Sauer magazines marked "Made in Italy"
The M18 designation ties this pistol directly to the U.S. Army’s compact service sidearm, sharing the same coyote-tan slide, frame, and ambidextrous controls. Its serialized stainless-steel fire-control unit is the heart of the P320 system, allowing caliber or size conversions by swapping out grip modules, slides, or barrels.
The carbon-steel barrel measures 3.9 inches, balancing concealability with reliable velocity. Paired with a carry-size grip, the pistol offers a full, controllable hand purchase while remaining easy to carry.
An optic-ready slide ships with a factory cover plate and is cut for DeltaPoint PRO, ROMEO1 PRO, and ROMEO M17 footprints, letting the owner add a red-dot sight without gunsmithing. Front and rear cocking serrations provide solid purchase for slide manipulations.
High-visibility SIGLITE tritium 3-dot night sights sit just above the optics cut, giving clear sight pictures in low light and the right height to co-witness most micro red dots. A three-slot MIL-STD-1913 accessory rail accommodates lights or lasers.
This particular pistol ships in Massachusetts-compliant configuration with 10-round magazines and retains all of the military-inspired features that make the M18 notable.