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Availability: In Stock
The Sig Sauer P320 M18 X-Change Kit in Coyote Tan gives you the same combat-proven platform that earned its place as the official sidearm of the U.S. Marine Corps and across every branch of the U.S. Military. This 9mm Luger X-Change Kit converts a compatible P320 fire control unit into the M18 configuration, delivering the accuracy and reliability the military demands in a commercial package built to the same exacting standard. The 3.9" barrel strikes a balance between shootability and concealability, making it equally at home on the range, in duty rigs, or as a serious self-defense tool.
The M18 platform has earned its reputation through real-world combat testing and military adoption. You get Sig's legendary build quality, a non-manual safety design refined through military service, and the confidence that comes with choosing what professional operators trust. The Coyote Tan finish isn't just aesthetics—it's practical, subdued, and built to handle hard use in the field.
What makes the X-Change Kit system work for shooters is modularity. This kit is designed for 9mm/.357 SIG/.40 S&W fire control units, so compatibility matters before you buy. You'll receive one 17-round magazine and two 21-round magazines, giving you solid capacity options whether you're running drills at the range or carrying on duty. Keep in mind this kit requires a compatible P320 FCU—it won't work with .45 ACP or 10mm units.
| Caliber | 9mm Luger |
| Configuration | 3.9" X-Change Kit |
| Compatible FCU | 9mm / .357 SIG / .40 S&W fire control units only |
| Magazine Count | 3 (one 17-rd, two 21-rd) |
| Finish | Coyote Tan |
| Model Number | 8900268 |
The M18 X-Change Kit is compatible only with 9mm, .357 SIG, and .40 S&W fire control units. It will not function with .45 ACP or 10mm FCUs. Check your current P320 FCU caliber before ordering to ensure compatibility.
You receive one 17-round magazine and two 21-round magazines. This gives you flexibility for different carry preferences and range sessions.
This is the commercial version of the M18, built to the same standards as the platform adopted by the U.S. Marine Corps and all U.S. Military branches. It brings the same design philosophy, accuracy, and reliability to civilian shooters.
No. The X-Change Kit is a conversion assembly that requires a compatible P320 fire control unit. You'll need an existing 9mm/.357 SIG/.40 S&W P320 FCU to use this kit.
SKU: 115783258 • Width: 12.2in • Height: 2.4in • Depth: 13in • Weight: 2.7oz
Availability: In Stock
The Sig Sauer P320 M18 X-Change Kit in Coyote Tan gives you the same combat-proven platform that earned its place as the official sidearm of the U.S. Marine Corps and across every branch of the U.S. Military. This 9mm Luger X-Change Kit converts a compatible P320 fire control unit into the M18 configuration, delivering the accuracy and reliability the military demands in a commercial package built to the same exacting standard. The 3.9" barrel strikes a balance between shootability and concealability, making it equally at home on the range, in duty rigs, or as a serious self-defense tool.
The M18 platform has earned its reputation through real-world combat testing and military adoption. You get Sig's legendary build quality, a non-manual safety design refined through military service, and the confidence that comes with choosing what professional operators trust. The Coyote Tan finish isn't just aesthetics—it's practical, subdued, and built to handle hard use in the field.
What makes the X-Change Kit system work for shooters is modularity. This kit is designed for 9mm/.357 SIG/.40 S&W fire control units, so compatibility matters before you buy. You'll receive one 17-round magazine and two 21-round magazines, giving you solid capacity options whether you're running drills at the range or carrying on duty. Keep in mind this kit requires a compatible P320 FCU—it won't work with .45 ACP or 10mm units.
| Caliber | 9mm Luger |
| Configuration | 3.9" X-Change Kit |
| Compatible FCU | 9mm / .357 SIG / .40 S&W fire control units only |
| Magazine Count | 3 (one 17-rd, two 21-rd) |
| Finish | Coyote Tan |
| Model Number | 8900268 |
The M18 X-Change Kit is compatible only with 9mm, .357 SIG, and .40 S&W fire control units. It will not function with .45 ACP or 10mm FCUs. Check your current P320 FCU caliber before ordering to ensure compatibility.
You receive one 17-round magazine and two 21-round magazines. This gives you flexibility for different carry preferences and range sessions.
This is the commercial version of the M18, built to the same standards as the platform adopted by the U.S. Marine Corps and all U.S. Military branches. It brings the same design philosophy, accuracy, and reliability to civilian shooters.
No. The X-Change Kit is a conversion assembly that requires a compatible P320 fire control unit. You'll need an existing 9mm/.357 SIG/.40 S&W P320 FCU to use this kit.
SKU: 115783258 • Width: 12.2in • Height: 2.4in • Depth: 13in • Weight: 2.7oz