You aren't taking into consideration that guns don't exist to commit homicides. They exist for defense, sport, etc. Like I said before, it's the equivalent of wanting a ban on cars because some people are irresponsible drivers and kill others in accidents. We don't just get rid of things because some people use them irresponsibly.

What we should be doing to lessen murders by shooting is to work on improving mental health. Until you do that, the problem isn't going to be fixed. If it was even a possibility to remove every single gun from every single civilian, crazy people would still find a way to kill you. The difference is that the 99% of gun owners who are responsible are then left without being able to protect themselves.