JSD SUPPLY, MUP-1 Frame, NEW (COMING BACK SOON, ATF Frames/Receivers Ruling was VACATED June 30, 2023)
This is the current production JSD Supply 80% MUP-1 frame to build yourself a custom or self-built pistol based on the SIG Sauer P320. It will work with any P320 9mm, 40SW, 357SIG or 10mm (not manual safety without modification). Will also work with 45ACP with minor modifications. Current production frames fit the new drop-safety parts. Please note these are the current production frames offered by JSD. Frames require JSD Supply MUP-1 jig for completion. (Add a discounted jig above).
Frame requires finishing to be a complete firearm. All city, state and Federal laws apply when manufacturing your own firearm. Engraving is NOT available.
Includes: 1 JSD Supply MUP-1 (SIG P320) Unfinished Frame (Discounted jig available for +$110).
Manual safety version of the MUP-1 can be found here: MS JSD MUP-1
FCU Parts, Barrel, Slide, etc. are obviously NOT INCLUDED. SHIPPING RESTRICTIONS APPLY TO CA, CT, DC, HI, IL, MD, NJ, NY, RI, WA. ORDERS FROM THESE STATES WILL BE CANCELLED. MULTIPLE ATTEMPTS WILL BE CHARGED A RESTOCKING FEE.
No FFL is REQUIRED. THIS IS NOT A FIREARM. 80% frames cannot be returned. JSD has their ATF determination letter stating this is not a firearm.
See our option to add the manual safety pocket to your existing frame: Manual Safety Cut
14 Reviews Hide Reviews Show Reviews
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worked excellent just take your withit
good stuff
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Excellent Customer Service
Excellent customer service. Walked me through some issues with my build and got it resolved!
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Mup-1
You will not find better customer service , faster shipping, or better prices.
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Great part
As expected. Great part for another build. Yes it's a little rougher than previous version, but I polish the internals anyway. Came out great and easy install.
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A lot rougher than I thought
I know it is not a completed part, but this was a lot less finished than I thought. There were large scrapes and sharp edges on all the stamped surfaces. The over all dimensions seemed pretty accurate, and I am sure the part with work. Like I said I just didn't expect it to be so rough. AB Prototype Response - Thanks for the input. We dont manufacture the JSD frames. We purchase direct from JSD. The latest versions seem to be "rougher" than previous versions. We have no control over their QC.
