Where I live we have to worry about riots, with thousands of violent rioters, and so we need powerful weapons with lots of rounds of ammunition.
The police carry "Street Sweeper" shotguns that are 12 gauge shotguns with a big cylinder which holds a lot of rounds in order to deal with riots.
Having the police carry such weapons at times makes some sense.
An AR 15 with lots of rounds should be allowed in the case of riots, people need to be able to protect their homes and families from riots.
People need to take riots into account as we protect our 2nd Amendment rights.
No, not even in your riots have you needed an AR-15 with "lots of rounds."
1992 had the worst of it, with more than 60 deaths.
10 of them were killed by law enforcement.
None of the stories of the other deaths would have improved with an AR-15, though it's possible that
others would have died instead of them - and possibly more total deaths.
https://spreadsheets.latimes.com/la-riots-deaths/