Description
SIG Sauer P320-M18 9mm Manual Safety Pistol, Coyote, 3.9" Barrel, 10-Round
The SIG M18 is the carry-size military P320. It is the shorter MHS P320: the same coyote military 9mm in a 3.9 in. carry slide.
The M18 uses the shorter slide, not the full-size M17. A factory ROMEO-M17 is installed only when this page says so. These pistols ship to a licensed FFL.
This configuration
SIG lists this pistol for Connecticut, Hawaii, Illinois, Maryland, and New Jersey. That is not SIG’s separate Massachusetts M18 SKU (M18-9-CSS-MS-MA), and Confirm local magazine rules before ordering. No factory red dot is installed. The optic-ready slide uses the M17/M18 MHS configuration with a single-screw rear sight plate. SIG lists that footprint for DeltaPoint Pro and ROMEO-M17 sights. A SIGLITE night sight sits up front, and the rear sight is a removable night sight plate.
What ships
A factory optic is installed only when this page says so. This item ships to a licensed FFL. See the SIG M18 collection.
Specifications and Included Items
- Model: M18-9-CSS-MS-10
- Series: M18
- Caliber: 9mm Luger
- Pistol size: Carry
- Barrel: 3.9 in. carbon steel; not threaded
- Overall length: 7.2 in.
- Overall width: 1.5 in.
- Height: 5.5 in.
- Sight radius: 5.8 in.
- Weight: 28.1 oz with magazine
- Slide: Stainless steel; coyote M17 PVD finish; M18 slide marking
- Grip module: Standard coyote carry medium; coyote tan
- Sights: SIGLITE front night sight; removable night sight rear plate
- Optic-ready: Yes; M17/M18 MHS footprint; SIG lists DeltaPoint Pro and ROMEO-M17; no optic installed
- Trigger: Striker-fired with curved trigger
- Manual safety: Ambidextrous
- Accessory rail: M1913
- Included magazines: (3) 10-round steel magazines
- SIG state listing: Connecticut, Hawaii, Illinois, Maryland, New Jersey
- Loaded chamber indicator: Yes; visual and tactile indicator on the slide
- Transfer: FFL required











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