The SIG Sauer M18 CSS 9mm is the compact variant of the U.S. militarys Modular Handgun System, offering full-size firepower in a carry-friendly platform. Featuring a 3.9-inch barrel, Coyote PVD finish, and 21+1 capacity, this optics-ready striker-fired pistol is built for reliability, adaptability, and modern defensive use.
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The SIG Sauer M18 CSS comes equipped with the MHS slide configuration and an optics-ready cut for direct red dot mounting. Siglite night sights offer dependable low-light visibility, while the Coyote PVD finish provides durability and a sleek, non-reflective appearance. The compact size makes it ideal for concealed carry without sacrificing performance.
This model features ambidextrous controls and a manual safety for versatile handling. It includes three magazines—two 21-round and one 17-round—providing exceptional capacity in a compact frame. Marked with the M18 serial number series, this pistol offers a civilian version of the sidearm trusted by military personnel around the world.
SIG Sauer M18 CSS Specifications
Caliber: 9mm
Action: Striker fired
Barrel Length: 3.9 inches
Capacity: 21 + 1
Magazines Included: 3
Magazine Description: (2) 21-round, (1) 17-round
Frame: Steel frame
Finish: Coyote PVD
Grips: Coyote polymer
Sights: Siglite front and rear
Sight Type: Fixed sights
Optics Ready: Yes
Safety: Manual safety
Overall Length: 7.25 inches
Weight: 28.1 oz
Additional Features: MHS slide configuration, M18 serial number series
More Information
Barrel Length
3.9
Caliber
9mm
Capacity
21
Condition
New in Box
Finish Per Color
Coyote Brown
Manufacturer
Sig Sauer
Manufacturer Part Number
M189CSSMS
Model
P320 M18 CSS
Type
Semi Auto Handguns
UPC
798681715190
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV
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