Last I checked, bad guys don't need licenses or permits to obtain or use firearms.

Is the permit/license process going to keep bad guys from getting or using firearms? Are we wasting tax dollars by making people get permits/licenses?

If they're going to jail for robbing a bank anyway, does it bother a bad guy if they get another couple of years in jail for robbing the bank with a firearm?

If firearms are banned in the UK, why are there firearm crimes committed there? Are you saying that the bad guys aren't complying with the ban?