Honestly, this is an unpopular opinion: We need to ban private gun ownership and confiscate them from people who currently own them. Background checks won't stop mass shootings at this point, we still have too many guns. No civilian needs an AR-15, period.
You need a large police state, equipped with assault weapons like AR-15's, to take away other people's AR-15's. What a civilized way to solve the "problem" of gun ownership!
One thing that's hilarious is to ask leftists who favor both abolishing the police and confiscation of guns how that would work. I still haven't gotten a comprehensible answer.