Since the “crime” part of what you just posted is already given, no other “loopholes” matter - you already have what you need to convict. If murder, armed robbery, reckless endangerment, etc., remain illegal, you don’t need a federal law banning possession of guns to put people who do these things in jail.
“If murder, armed robbery, reckless endangerment, etc., remain illegal, you don’t need a federal law banning possession of guns to put people who do these things in jail.”
You need a federal law if your intent is to take power away from the states.
Possibly. But what if the only role the defendant played in the crime was that he transported the guns across state lines?
Usually, the transportation of the guns is simply used to increase the prison sentence. My view is that criminals get off way too easy anyway. Penalizing them for transporting guns is kind of a stupid remedy for that, but at least it’s something.