Receiver threads drilled crooked

[Robinhood]

I emailed them last night for a update as I had not heard anything since I sent the barrel back. He said they had a employee drop their go gauge and they had to send it out to be re calibrated.
Not sure what type of go gauge he is talking about though.

J&G A typical gauge for the internal threads;


And for the barrel side or OD threads


(FYI, these are not the same threads as the Savage action and barrel tenon, for information purposes only)