Where is your evidence that most guns are obtained illegally? And is that because there are a large number of guns already available? Would it make it easier then to require every situation to have a background check then?

I am not sure why gang members could not get their guns legally. If they do not have a criminal background they can go and get whatever they want. Even if they do, in lax states they can still get them depending on what they were busted for.

Suicides are still gun related deaths. And it still highlights that the more guns around the easier it is to commit gun related homocides or kill yourself.

Guns make killing oneself about 95% effective. It is the preferred method of offing onesself.

I think you are trying to make things so narrow in scope that it becomes worthless.

One could argue that handguns are more responsible for crimes than rifles etc. and that is true, but mass shootings seem to be more trending towards things like AR-15s even if the later is only responsible for a small percentage of gun deaths in general.