Well, kind of :)
One of the commenters suggested I use stink bombs as ammo... I think that is a great idea!
So I ordered some samples. Basically they come in two variants:
a) the "mild" red type, weighing 2,6 gramms (41,6 grain)
b) the "double ought" type, weighing 3 gramms (48 grain)
I am thinking about a small "pump action" type weapon that allows you to throw a "carpet" of stink bombs very quickly (hahahahahahaaaaa).