Boy I really like pretty much everything I've seen in this thread. Particularly, Mike's club stock. When I first was getting into flintlocks @ age 14 or 15, for some reason I was really drawn to the early club stocks in George Neumann's old little 'blue book.' I wore the binding right off that book.
I know the concept here are rifle guns, as Bob began the thread, but it's really hard to my way of thinking to discuss plain or otherwise "utility" arms without bringing club stocks into the equation. I think they may very well be the epitome of utilitarian function, covering pretty much all the bases (except maybe when it comes to squirrels, in which case given the generally large bore, they tend to annihilate such small mouthfuls of sustenance...).
I think it was around 1992 or 1993 that I first began attending the F/I encampment up at Ticonderoga, and the first year I was there, I met a guy who had a few dug relics of a gun that were found somewhere in Massachusetts. I don't remember specifically where they were found, other than that they were found in MA. There was a lock, a brass guard and a bunch of screws. So of course, I rushed home to make a piece along the lines of what I thought it may have looked like. The lock was particularly interesting because it was just plain weird and I thought - and still do - that it may have been a very early American forged lock dating to the second half of the 17th century, which would make it quite spectacular indeed if in fact it was American made. I've not seen any European work exactly like it - it's kind of a cross between the earliest style of English doglock and later English doglocks, but with a French-ish (for the period I believe) vertically moving sear. The guard was cool too since it was just a simple loop of brass with short pointed finials, but the bow was swaged out in a spoon shape.
I think this piece dates to around 1994. I kept it and used it for a few years, took one deer and a couple of turkeys, then at some point before 2000 sold it at Fort Ti. I wish I knew where it was now, would love to see how it's aged. Don't remember what barrel I used other than that it was around .72 or .75.