If you're not going to prosecute the criminals who use guns in crimes, who cares what kind of gun it is.
Boo Boo is a street thug. He has several felonies and cannot legally own weapons, and has other restrictions on his parole and probation. Boo Boo takes a gun and shoots at a rival for a very minor disagreement, runs form the police, and violently resists arrest before he is captured and put on trial.
Boo Boo faces 49 charges from the state. His lawyer gets it plead down to two charges, and the sentences of both charges will be served concurrently.
When Boo Boo gets out of jail early because of prison crowding, and gets another gun and goes on another violent spree, we are told that the real problem is that we don't have enough gun laws or criminal laws. They tell us we need more restrictions and laws so that when Boo Boo gets into trouble they can throw 56 charges against him, so his lawyer can get them down to two charges with the sentence served concurrently this time.
We are told there aren't enough laws, when there are already too many laws. We are told there is a lack of leverage against criminals when the current leverage is squandered. We put men in prison who should be executed, and then let them out early.
But, yes, more laws.