[Oatka]

you may just need an AR-15.

Or a KelTec PMR30 (30 rounds .22 mag rimfire):

MSRP $415 - $700+ On GunBroker.

[nonsporting]

you may just need an AR-15.... Or a KelTec PMR30 (30 rounds .22 mag rimfire):

Colonel Jeff Cooper was fond of the lowly 22lr for riot control. One of these should work fine:

A pistol will work. But the longer sight radius of the carbine means greater accuracy and increased velocity and effectiveness.