Another idea: Develop spiked strips with razor sharp 3” nails pointing up that can be deployed rapidly. Throw them down on both sides of the rioters/looters in the street and then open a gap and send in a group of LEOs to arrest people. No one is running anywhere. I have many more ideas.
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How about just holding a handgun and an AR-15?
Oh, and they broke down the gate leading into the gated community. How are those gated communities working out for you folks? Great protection, huh? I would prefer some creative thinking to affect a larger group than could be done by two people holding weapons, in answer to your question.