I never went to school for gunsmithing. I think some people just don't need it and, on the other hand, I have known people who went to gunsmithing school and still didn't have enough natural mechanical ability to get by as a semi-decent gunsmith. One even went to Colorado School of Trades, IIRC. There is something that can't be measured or taught that is required to be more than one dimensional when it comes to this stuff. I studied machining 20+ years ago and just completed CNC programming and fabrication school. I get by with that, research when I don't already know something, ignoring what