P320 Sig Sauer – JSD 80% MUP-1 Frame Insert Finishing Jig

P320 Sig Sauer – JSD 80% MUP-1 Frame Insert Finishing Jig


93 in stock

Build your own dream 80% Sig P320 Pistol using our 80% Sig Sauer P320 Jig & our Sig P320 80% MUP-1 Insert (Insert Sold Separately). This Jig offers a seamless building experience for finishing and completing your new 80% P320 modular chassis MUP-1 Insert (Insert Sold Separately).

We also offer a complete line of Sig P320 parts and X-Change Kits so you can complete your new builds. Check out our Gun Parts, 80% Lowers & Jig Category for all the parts you will need. Have fun building your new P320 Sig.


93 in stock


P320 Sig Sauer 80% MUP-1 Jig


80% Sig Sauer P320 MUP 1 Jig is the ultimate tool for building your own P320. Get started now!

  • 80% Sig P320 MUP-1 Jig
  • P320 Compatible: Perfect for your Sig Sauer.
  • Easy to Use: Just follow the steps.
  • Recommended Tools: Dremel, vise, drill press, files, and drill bits (NOT INCLUDED).


What are the benefits of the 80% Sig Sauer Jig – P320 Compatible – MUP 1?

With this jig, you enjoy:

  • Customization freedom
  • Precision and accuracy
  • Easy-to-follow process
  • Compatibility with P320

Can I use this jig for other pistol models?

This jig is specifically designed for the Sig Sauer P320 model.

What tools do I need to complete the 80% jig?

You’ll need a Dremel, vise, drill press, files, and drill bits.

Do I need any prior experience to use this jig?

Some experience recommended, instructions can be found online and have the recommended tools. However, if you’re unsure, consult your local gunsmith. There are also plenty of videos available on YouTube and other video platforms that show the entire process.

Is it legal to use an 80% jig to build a Sig Sauer P320?

Yes, as long as you adhere to federal, state, and local firearm laws.

DISCLAIMER: At U.S. PATRIOT ARMORY, we by no means provide legal advice or legal counsel. Every builder needs to research their respective City, State and Federal laws in the area they are ordering from. We DO NOT provide gunsmithing advice. U.S. PATRIOT ARMORY is not responsible for improper builds, damage or injury due to user error.

Our products are not sold or shipped to residents of New Jersey

WILL NOT SHIP to the following areas: California, Colorado, Connecticut, District of Columbia, Hawaii, Illinois, Maryland, Massachusetts, New Jersey, Delaware, New York, Rhode Island, Washington and Philadelphia, PA. THERE WILL BE A 10% RESTOCKING FEE

Experienced Gunsmith installation and proper new round break in period recommended.

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