We have officially decided that if and when this piece is finished, it shall be called the "Killo Ma-Wacker".
It occurred to me that that new shell design A) isn't really rocket propelled (because the propellant is in the shell casing) and B) it would probably have recoil, though we don't know how much.
Depending on the amount of recoil, we MAY be able to convert it to fire semi-auto. Keep in mind that is a MAYBE as in we don't know and it only a theory so far. We will see what we can do once we have the first model fully functional.