I’d accept a national firearms owner I.D. stating that I have passed a NICS check and therefore eligible to own, buy, sell and carry any firearm, at any time, in any state.
No FFL’s for transfer, no registration, no permits. One I.D. that states that I am not disqualified from owning a firearm.
Anything short of that is a non-starter.
Strange I thought that was a birth certificate function.