I am wondering how many AR15 80% lowers can be finished with an average jig. I bought 10 80% lowers today and am hoping to buy either a couple used jigs or a new one that will be able to finish them all. The lowers I bought were polymer, so I am hoping I will be able to tell if I touch the jig while drilling.
What is your experience with the longevity of these? If you have any that are your favorite or that you would not recommend, please elaborate.