Why draconian gun control laws never work
One problem is that the bans didn't actually have any discernible effect on the availability of guns to people with felonious intent. As with drugs and hookers, when there is a demand for guns, there will always be a supply.
Who places the highest value on owning a firearm? Criminals. Who is least likely to fear being prosecuted for violating the law? Criminals. Who is most likely to have access to illicit dealers? You guessed it.
If we were starting out in a country with zero guns, it might be possible to keep such weapons away from bad guys. But that's not this country, which has more than 200 million firearms in private hands and a large perpetual supply of legal handguns.
Only a tiny percentage of those weapons has to be diverted to the underground trade for crooks to acquire all the firepower they need. While gun bans greatly impede the law-abiding, they pose only a trivial inconvenience to the lawless.