12 gauge is just a touch bigger, maybe three paintballs in the shell with a wadding carrier. Just the primer may be enough to propel them out at marking velocities. The big problem is how to instantly switch between lethal and non-lethal, and have more than one shot per, without making the weapon too cumbersome.
You know that gun technology that stacks bullets in the barrel? How about a double barrel, one barrel for deadly, one for paintballs.
Anyway, I was really thinking of an air powered paintball gun on full-auto, where you can just spray and know the little bastard’s going to be noticed, and be able to hit several running out the door at the same time. But racking it loads a shotshell, disables the paintball, and makes it deadly.
Farah will probably end up dead...Shot to death in an armed robbery...
Kel-Tec Shotgun (KSG) - http://www.keltecweapons.com/news/preview-kel-tec-shotgun-ksg/