Sorry for the long delay, I needed to find a time where I would be alert enough to understand your post and give it the attention it deserves, hopefully I have managed that.
On the first point, Yes typical case of typing before fact checking on my part.
As for the second definition you are right, I for some reason was not registering the fact that the Reservoir positioning on a ballistic weapon is as a result of the ramp placement not the other way round and I must apologise for that error
Also again I would agree that the Chamber/initiator/start point would make the best defining point as it is the one feature where majority of the time there is an equivalent, the only exception I can think of is a weapon where the initiator and the barrel are one and the same, for example a Laser could follow that mode of operation, but then you would be looking at a special set of form definitions/descriptors.
I think you summed the issue up brilliantly, from a words point of view in conveying meaning and imagery to an audience, when dealing with technology where there are few or no current example it is hard to convey an idea of what you see in your own mind's eye.
For example the the relatively uninitiated the distinctive thing when looking at a Styer Aug or a L85/86 is the mag behind the grip, the fact that that is a by-product of what actually makes a bullpup would probably be lost on them.
Also my first pov on a lot of things is the technical standpoint which probably didnt help matters, and yes you are certainly free to use any part of what we have said.
As for the utility/fantasy part combined with how realistic the renders are I would also agree that at this standard if a quick comment about the utility is the most reasonable suggestion then fair game, reading back, my reply was a bit smart ass for my own good, though I have enjoyed this discussion its gotten me thinking about things which is always a good thing.