[EricH]

Originally Posted by krazyman1013

It would be improbable. First you would have a mechanism to load the barrel, then aim, and finally shoot. There are too many moving parts. Keep it simple.

Really... I can think of a couple of mechanisms from 2008 that could be modified to do it well, that are quite simple. Say, Winnovation's punch from that year modified to allow it to latch in any position desired and supplied with a barrel. Then you have to deal with the loading problem, which could be much simpler.