Actually,I thought of two more restrictions. 1) Only US citizens could manufacture,distribute or possess a firearm and 2) Nobody under the age of "x" (perhaps 16) could possess a firearm.
‘... proven themselves to be bad...’ - like politicians and bureaucrats, for instance. We should push to deny bureaucrats any form of protection paid for by taxpayers. They should have to live like the ‘little people’.
Possession means holding it in your hand.
At 16, I had already been hunting for seven years.
I got my first deer at 11.
But then, I grew up in the sticks, well outside of town.