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The SIG Sauer P320-M18 and M18-Commemorative Edition are compact striker-fired semi-automatic 9mm Luger civilian versions of the US Army’s new M17. Depending on magazine, it’s a 10+1, 17+1 or 21+1 semi-auto. This Coyote Tan carry pistol mates a stainless-steel slide, barrel and frame to a polymer grip module. Its six variants vary only in magazine offerings that include 10-round, 17-round and 21-round magazines and corresponding state compliance. Its richly featured with an MIL-STD-1913 accessory rail under the muzzle, SIGLITE Front / Night Sight Rear Plate, excellent non-slip grip texturizing and serrated surfaces for all the levers and other key moving touchpoints.

SIG puts extensive thinking into ergonomics and design attributes making operation incredibly intuitive. This P320-M18 replete with thoughtful touches and well-done tactile surfaces ranging from the expected to the unusual. For instance, the PVD Coyote Tan slide has nicely done forward leaning diagonal grip serrations in both front and back. The gun is set up for ambidextrous use. The thumb safety at back is ambidextrous and the magazine release can be reversed for either left-hand or right-hand use. The slide rear cap has a recessed tray contour that also facilitates feeling your way around the pistol. And for more safety, the M18s feature a Loaded Chamber Indicator (LCI), striker safety and a disconnect safety.

Integrated in the grip module is the combat trigger guard. It has horizontal serrations and gentle concave surface and a deep undercut at back. Housed within it is a standard curved trigger with a 6-to-7-pound trigger pull. The grip module also has an integrated 3-slot MIL-STD-1913 Picatinny accessory rail under the muzzle.

The SIGLITE Front / Night Sight Rear Plate sights mean the front has a white dot sight while behind the blackout rear sight awaits a removable cover plate you can mate to red dot optic sights. The dovetailed front sight can be moved left or right for windage or be swapped out with other height front sights to adjust for elevation.

The four variants share so many characteristics including color, frame and all key dimensions. So the 6-groove 1:10” twist 3.9” carbon steel barrel sits in a long slide giving the gun a 7.2” overall length. The sight radius is 5.8”. The M18’s height is 5.5”, and it’s 1.6” wide across its ambidextrous thumb safeties at back. Of the four, one variant without manual thumb safeties. These guns each weigh 28.1 ounces.

The six standard M18 models vary in magazine configurations. They are Coyote Tan except takedown lever, magazine release, trigger, manual safeties sights, removable sight plate and barrel are matte black!

The variant without the manual safeties comes has a solitary 17-round magazine; there is also a similar model with safeties and a 17-round magazine. The others vary. One features three 10-round magazines for compliance with state regulations in Colorado, Connecticut, Hawaii, Illinois, Maryland, Massachusetts and New Jersey. The four has one 17-round mag and a pair of 21-round mags! The 17-round mags almost fit flush while the 21-round ones extend a bit below the grip module.

The new for 2021 SIG Sauer P320 M18-Commemorative Edition is the same as the last variant with its one 17-round mag and a pair of 21-round mags! However, its slide catch, takedown lever, magazine release, trigger and manual safeties are Coyote Tan instead of matte black. The sights, removable sight plate and barrel remain matte black providing a tangible aura of coolness! SIG will make only 5,000 of these serial numbered M18-0001 to M18-5000. They feature an optional exclusive dark mahogany stained solid cherry box and tempered glass top M18 Collector’s Case.

SIG Sauer makes the P320-M18s in Newington, New Hampshire.

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