SIG Sauer P320-M18 9mm Compact Semi-Auto Pistol, Optics-Ready Coyote Tan, 21+1
The P320-M18 is the commercial version of the U.S. military’s M18 Compact Modular Handgun System. Built in the USA, it mirrors the service pistol’s coyote-tan finish, modular fire-control unit, and both 17- and 21-round magazine options. An optics-ready slide, night sights, and fully ambidextrous controls round out a sidearm designed for duty use yet sized for everyday carry.
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.
Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Only minor handling marks are visible on high points of the slide and frame, with no notable finish loss. The bore remains bright and clear.
What’s Included
- (2) 21-round factory SIG SAUER steel magazines with coyote-tan baseplates
- (2) 17-round factory SIG SAUER steel magazines with coyote-tan baseplates
This P320-M18 retains the serialized, removable fire-control unit that allows easy caliber or grip-module changes, a hallmark of the P320 series. The serial-number prefix begins with “M18,” echoing the military designation and adding a touch of authenticity for collectors.
The carbon-steel slide wears a durable coyote PVD finish and features both front and rear cocking serrations. Its SIG-LOC/PRO footprint accepts the ROMEO-M17 and similar reflex optics without an adapter plate, while the removable rear sight plate maintains zeroed SIGLITE night sights out of the box.
Black controls contrast sharply with the coyote polymer grip module, providing instant visual reference and maintaining the exact configuration adopted by the Marine Corps. An ambidextrous manual thumb safety and reversible magazine release ensure true bilateral operation.
At 3.9 inches, the carbon-steel barrel delivers service-grade accuracy in a compact package. Combined with 17- and 21-round magazines, the M18 offers full-size firepower in a footprint that conceals easily.