U.S. SWAT teams often use paintball-like balls, also known as pepper balls, filled with oleoresin capsicum, the active ingredient of pepper spray, as a non-lethal incapacitation method. However, pepperballs are shot at a higher velocity than is safe for paintball (above 110 m/s (360 ft/s)) and the shells are not made from gelatin, but rather a frangible plastic to make shots more painful for faster incapacitation. Pepperballs can be shot out of almost any paintball marker.
What about a 22 or a pellet gun?
paintball guns use c02 to rapidfirenot easily doable with a 22 or pellet
that's what shotguns are for.