On that note, I thought I'd mention P80 is Buy one get one free on compact lowers.
Add one to your cart, two will show up.
https://www.polymer80.com/-BKC-BLK
You can 3d print the jigs or buy them for $25ea from some other place.
At some point I'd have to think you have too many 80% lowers for them not to think you're manufacturing wepons but... that's a later problem.
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