Flintriflesmith,
I'm confused as to what makes this one a "wall rifle". 1 3/16" at the breech isn't that heavy with a .68 cal. bore; couldn't it just be a "bear rifle"? I looked at RCA and read the Muzzle Blasts article and still don't know how I should know it is a wall rifle, if that makes sense. What am I missing? If the answer will give away part 2, just let me know, and I'll wait to read it!
One interesting thing is that it seems like this could be at least a third generation re-use of the lock, as I can't see any purpose in adding a fly detent to the original lock just to put it on this rifle with a single trigger.