Rich,
Thanks for the summary and I agree with you I like things historical too. The German rifle I was referring to was called a boar rifle, the lock had an engraving of a hunter in a top hat shooting an approaching boar, and it was short (around 24" and was purpose built as a boar rifle) but nowhere near as short as the one in the video. Tools much like rifles evolve through use. Something as simple as how to carry a long rifle has changed over time, be it walking, river travel, horseback, or whatever. I use to do a lot of hiking and canoeing in the wild and I once had a shotgun cut down so I could more easily carry it in a canoe. Its the process of that evolution (through need?) that I find interesting. The concept of a canoe gun or better put short barrel rifle, is interesting from a practical reason at least to me it is. Of course a blunderbuss or a military carbine immediately come to mind but would there have been a demand for something more accurate and short than those....given the length of the barrel?
Rob