You have to remember that in the States practically ANY adult can buy a gun.
Bit of an aside, but it's worth remembering that actually - despite all the rhetoric - over 23 million adults in the US are prohibited from owning a gun.
Mostly made of up of:
10 million "illegal aliens"
6.4 million mental health
4.6 million done a crime with a long enough jail sentence
Which is a pretty good way of both having a constitutional right to bear arms and then denying it to a lot of black and Hispanic people.
(Particularly if your database is prone to false matches of personal details.)