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Grab the P320 jig for your MUP-1 80% Sig Sauer fire control unit.
Machining the MUP-1 fire control unit (FCU) for your 80% P320-compatible handgun means performing cutting and drilling operations. That task is made viable with a P320 jig, like our available units designed by JSD Supply.
The Sig Jig provides a pre-fit, vise-like seat for the unfinished P320 internal blank. Using the jig as a guide, you'll perform the necessary machining operations -- cutting and drilling -- to turn the FCU blank into a functional chassis that's ready for an internal P320 parts kit, slide, barrel, and grip module.
New builder? Read our guide: How to Build an 80% Sig P320.
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