Just get this in your head...any gun control law only effects law abiding citizens and makes gun ownership more difficult and expensive. Think back in the 1870's....they called these laws "Jim Crow" laws.
Those with criminal intent will obtain, and use whatever guns they wish, does not matter what the law is. Remember that!
You can go do some searching, but I was surprised when I saw the % of guns used in crimes...that had been stolen from the POLICE.
It was a higher number than arms stolen from LAC. Sorry I don't have the link on this computer...If I remember correctly it is buried in the FBI stats.