And how many are capable of doing the machining necessary to complete the project?
Don’t need to know machining. 80% glock lowers come with a drill jig and all you need is a Dremel to remove extra material. Buy a slide, and other parts, you are good to go. I know because the company I work for is all about those parts.
And how many are capable of doing the machining necessary to complete the project
Some places have you push the button to start the machine to finish the part.
As far as AR’s go, I use the jig from 80% Arms, and you would not believe how easy it is, if you haven’t tried it. Each time I make one they get better, but so far each one I have made (2) has worked perfectly.
https://www.80percentarms.com/collections/lower-jigs