It's funny you should bring that up now Kjeff. I was thinking a few weeks ago about buying one of the H&A boot pistols with a rifle stock that they market as a canoe gun. I do use a canoe and I also like a small, powerful gun with me all the time. I've been using my 44mag but I want something with a stock. Anyway....I started thinking about building something. I have a number of barreled actions but I wanted something with about a 12" bbl.
In order to do that I would need to either go without the stock, or make the barrel 16 (18 for a shotgun) or build a muzzleloader.
It just so happens I have an inline 12ga that I hate. It's a nice shooter but doesn't suit me as a hunting ML. I think I'll build a lamanited stock with a pistol grip and a detachable stock. A 12 inch barrel with a poly choke will give fair patterns, enough power and make it compact enough for easy carry in a short case. This will include the stock and several preloads.
I may start on it this coming week!