This complete caliber X-CHANGE kit allows you to convert your manual safety 9mm P320 to the civilian version of the U.S Marine Corps' M18, featuring the ability to mount the ROMEO-M17 reflex sight.
Learn more about READY FOR DUTY
The SIG SAUER M18 is the official sidearm of all branches of the U.S. Military and the official sidearm of the U.S. Marine Corps. The commercial M18 brings the same unprecedented accuracy, extreme reliability and unmatched durability the military demands.
This kit includes:
- (1) 17-round magazine and two (2) 21-round magazines.
- Full-size 3.9" Coyote-tan PVD coated stainless steel slide.
- SIG-LOC MHS footprint capable of accepting the ROMEO-M17 Red Dot Optics. (optic not included)
- Equipped with a SIGLITE front night sight and a removable Night Sight rear plate.
- Coyote-tan carry-length grip module.
- 3.9" Barrel and recoil spring assembly.
Note: This grip module is designed to accommodate manual safety Fire Control Units (FCU).
Optic not included.
Learn more about SIG SAUER conversion kits for the P365 & P320.
Specifications
| SKU | CALX-M18-CSS-MS |
|---|---|
| Model | P320, M18 |
| Category | Conversion Kits |
| Color | Coyote Tan |
| Accessory Rail | M1913 |
| Caliber | 9mm Luger |
| Mags Included | (1) 17rd / (2) 21rd Steel Mags |
| Magazine Material | Aluminum |
| Barrel Included | Yes |
| Barrel Length | 3.9 in [99.06 mm] |
| Threaded Barrel | No |
| Recoil Assembly Included | Yes |
| Pistol Size | Carry |
| Sights | SIGLITE Night Sights |
| Optic Ready | Yes |
| Grip Color | Coyote Tan |
| Manual Safety | Yes |
| Grip Material | Standard Polymer |










