Description
SIG Sauer M18X 9mm Pistol with ROMEO-M17, Coyote, 3.9" Barrel, 21-Round
The SIG M17 Romeo-m17 is the full-size military P320. Coyote, optic-ready, and built around a 4.7 in. barrel, it is the full-size MHS P320 as issued to the U.S. military.
The M17 uses the longer slide, not the carry-size M18. A factory ROMEO-M17 is installed only when this page says so. These pistols ship to a licensed FFL.
This configuration
The rest of the X-series package matches the M17X. The coyote X-Carry grip module includes a magwell and an X-series flat-blade trigger. There is no manual safety. SIGLITE sights can co-witness with the ROMEO-M17 on this M17/M18 MHS slide. The optic is an enclosed 1×24 sight with a selectable 2 MOA red dot and 32 MOA red circle, not a universal P320 red dot. Three 21-round steel magazines are included. Confirm magazine-capacity rules before ordering. The shorter M18 slide is the reason to choose this pistol over a full-size M17X when overall length matters.
What ships
A factory optic is installed only when this page says so. This item ships to a licensed FFL. See the SIG M17 collection.
Specifications and Included Items
- Model: M18X-9-RX
- Caliber: 9mm Luger (9x19mm)
- Barrel length: 3.90 in., carbon steel
- Overall length: 7.25 in.
- Slide: Stainless steel, coyote PVD, compact M18
- Grip module: Coyote X-Carry polymer with magwell
- Trigger: X-series flat blade; no manual safety
- Sights: SIGLITE night sights; co-witness with the mounted optic
- Optic: Factory-installed ROMEO-M17 enclosed 1×24 red dot, 2 MOA / 32 MOA
- Optic power: CR2032, side-loading battery compartment
- Capacity: 21-round; three 21-round steel magazines included
- Accessory rail: M1913
- Transfer: FFL required









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