[cassiusking]

For crowd control, perhaps 12 gauge, 3”, rifled barrel,extended magazine, and #4 buckshot. 440 projectiles in 5 seconds in a 6’ pattern at 20 yards would be very effective

[Blue Jays]

Hopefully that would be sufficient against somewhat "unmotivated" urban youths who might realize it is wiser to run away than stick around to fight.