Sig Sauer P320-M18 Commemorative Limited Edition 9mm Compact – Rare Civilian Release with Bobro RMR Optic Plate
This limited-run P320-M18 Commemorative delivers the exact external markings and coyote-tan finish of the U.S. military’s M18 sidearm, complete with UID plate and CAGE code. One of only 5,000 produced, it adds collector appeal while retaining the modular fire-control unit, optic-ready slide, and ambidextrous controls that make the P320 series so versatile. The pistol offered here is further enhanced with a factory-installed Bobro Engineering RMR-pattern optic adapter and a bright red fiber-optic front sight, giving buyers a turn-key carry or duty package that remains true to the service model.
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 rifling – sharp lands and grooves.
Specific Condition Notes: Minor superficial scratches and blemishes are present on the slide and frame; the bore remains clean and shiny.
What’s Included
- Bobro Engineering RMR-pattern optic adapter plate (installed)
- Red fiber-optic front sight (installed)
- Two 21-round steel magazines with coyote-tan baseplates, marked “Made in Italy”
- One 17-round steel magazine with coyote-tan baseplate, marked “Made in Italy”
This M18 Commemorative is built on Sig’s modular fire-control unit, allowing caliber, slide, and grip swaps without an FFL transfer. The compact Carry grip module keeps weight down while providing a full 17- or 21-round magazine capacity, and the reversible mag release plus ambidextrous thumb safety suit left- or right-handed shooters.
The coyote-tan PVD slide features forward and rear serrations, a factory MHS optics cut, and the installed Bobro RMR plate—ready for popular miniature red-dot sights without additional machining. Nitride-treated carbon-steel barrel measures 3.9 inches, balancing concealability with reliable velocity from standard-pressure 9mm Luger loads.
Externally identical to the issued sidearm adopted by the U.S. Marine Corps, this pistol carries the official UID plate, CAGE code, and service markings, making it especially desirable for military collectors. Yet it remains a fully functional striker-fired defensive handgun with night-sight capability, modularity, and a proven short-recoil, locked-breech action.
Only 5,000 of these civilian M18 Commemoratives were produced, and the addition of a quality Bobro optic plate and fiber-optic front sight sets this example apart. Its very good overall condition and excellent bore ensure it is ready for range work, carry, or display.