Good grief! Run from this guy and never look back. He has NO IDEA what he's doing and he is FOR SURE in the wrong business.
To the ATF, it's about knowing who is authorized to work on other people's firearms for pay.
I'm not saying you need to spread this guy's name all over the internet but, if someone (especially) in the area where this guy "operates" asks for his information, I hope you PM them the info. Also, this guy needs to be reported to any "gunsmith in your area" list that you might locate now or in the future to prevent your fellow shooters from going through the same agony you've been through. (My opinion) Good luck in getting his screw-ups corrected.What is his name/the name of his business?
Just my .02,
LeonCarr