Sig Sauer P320 m18


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Sig Sauer P320 m18 Product Details

The Sig Sauer P320 m18 at JSD Supply is one of the most unique Sig Sauer compatible kits on the market. If you’re wanting to build a clone of what the military uses, this is the kit. You can upgrade your current MUP-1 or Sig Sauer P320 fire control unit to the new Sig Sauer P320 m18. The M18 is a great choice when upgrading your p320 platform. The slide is pre cut for a red dot sight so you can be sure to hit your target. For a range or competition gun, this is a unique build.




This Sig Sauer P320 m18 Combo includes:

  • 9mm
  • 3.9″ Barrel
  • Coyote Grip Module
  • Sig Light Night Sights
  • Pre Cut for a Sig Romeo 2 and RMR
  • Patmos Arms Flat faced Trigger
  • Magazines (restricted states no magazine)

What is NOT included:

  • MUP-1 is NOT included
  • A finishing jig is NOT included
  • Lower Parts Kit available separately


  • If you live in a NON Restricted state, we will include 1 – 17 round Magazine.

A Complete Combo

What makes the Sig Sauer P320 m18 Combo stand out is it comes with everything you need to complete your build. It helps you complete your MUP-1 or FCU into the awesome M18 carried by so many of our armed service men and women.

As the ultimate DIY firearm solution, this kit helps you build the perfect handgun for your needs right in your own garage.

With a modular P320, you can select one of several centerfire calibers to fully customize your weapon. Just disassemble the pistol and reassemble it with the X-Change Kit’s barrel/slide assembly, grip module, and magazine for a truly unique sidearm.

Find What You Need in Our Inventory

Rely on JSD to cover all of the parts you need. Our extensive inventory covers several Sig Sauer P320 X Change kits and more so you can have a Sig Sauer pistol without the hassle.

We’ve been a reliable partner to the DIY firearm community since 2013. Order our Sig Sauer P320 m18 kit for a hassle-free build.

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