Sig Sauer Caliber X-Change Kit, 9mm, P320-M18, Coyote Finish, 1-17Rd & 2-21Rd Magazines

The Sig Sauer P320-M18 Caliber X-Change Kit lets you convert your existing P320 platform into the proven configuration trusted by the U.S. military. Featuring the M18’s compact slide assembly, coyote PVD finish, and complete grip module, this factory kit gives shooters a turnkey way to run their FCU in the exact footprint and performance profile of the service-ready M18. This is the most direct, factory-correct upgrade path to the M18 configuration. Sig includes one 17-round and two 21-round magazines, giving you a full-duty loadout right out of the box. The optics-ready slide mirrors the military spec, complete with night sights and a PVD coating built for hard use. No fitting, no gunsmithing—install your FCU and you’re running an M18 in minutes.

Specifications:

• Model: Sig Sauer P320-M18 Caliber X-Change Kit
• Caliber: 9mm Luger
• Slide: Compact M18 slide assembly, optics-ready
• Finish: Coyote PVD
• Grip Module: Carry-size coyote polymer module
• Barrel Length: Standard M18 compact length (approx. 3.9")
• Capacity: Includes (1) 17-round magazine and (2) 21-round magazines
• Sights: Factory night sights
• Features: Complete conversion kit, military-spec configuration, optics-ready slide, full-duty magazine loadout
• Use Case: Duty-style setup, training, home defense, P320 platform expansion