Max its just better to call and ask the government for the final answer, i rather would than have some guy just showing me a card. Its not efficient but i rather trust that method than anything else.
But it wouldn't be just some guy showing you a card, they would show you a card, and you would scan it, or worst case type in the number on it manually into your computer, it would access a database of license owners, and you would be able to see the license owners name and photo, and if their license is still valid. It would be just as secure, but faster and using less human resources.
As long as that record is kept up to date, your background check is instantaneous, and if the customer failed a mental health check, or was convicted of a crime, you can void the license instantly, and best of all it maintains their right to privacy because people who had nothing to do with why the license was voided wouldn't have to know why.
The government is still deciding if it is ok to sell a gun or not, but they decide in advance when you get a gun license, and can change their mind if you do anything that would fail a background check.
I'm wondering, what merit
does a gun license say in the US of A? If it isn't a declaration that you are sane with a clear criminal history, what is it for?
The thing is, the USA already has an established system toward acheving the same sort of goals I imagine your licensing idea would hold, but exactly what benefit would a licensing scheme accomplish better then the system already in place?
It would be faster and use less human resources. Less tax payer dollars going to people spending their time doing background check after background check. The exact same people would be able to buy a firearm, just with less bureaucracy.