Most states have a waiting period to take a weapon home after the background check is complete. WA state for example is 10 days unless you have a concealed carry permit. A lot of states have also done buy back campaigns and there has been extensive research on less that leathal weapons(I have had a new model of taser every other year for the last 6 years). So I agree with all of that, as for the assault weapons they are already banned to everyone unless they have a license from the ATF. I believe the weapons you are referring to are like the AR15 a semi automatic rifle that functions the same as any semi automatic rifle. I can agree with people that want to purchase a weapon such as an AR15 needing a training course prior to purchase.