There is no excuse for bump stocks, semi automatic, or automatic weapons other than as a weapon for hunting human beings and killing as many as possible in a short amount of time. If we want a civil society, based on rule of law, these weapons need to be outlawed (again) or they remain a threat to civilization as we know it and aspire to. Research in other countries (Australia, Japan etc) clearly shows outlawing these weapons reduces gun violence. NRA says guns don't kill people, criminals do, but the fact is access to automatic & semi automatic weapons and bump stocks allows people to kill and maim hundreds of other people in very very short order. These weapons should be banned.