Gun running would not be happening, there would be no money in it if there was not gun control in the receiving city. Those $80 guns would still be $80 in NYC if not for the Sullivan law.
Just like a weed like Marijuana that becomes more valuable than gold when you make it illegal.
In both cases, the problem is a government that ignores the constitution.
Then you'll see commercials about how 'you're sponsoring terrorism every time you buy a smuggled gun'.