That's one nice gun! Something to be proud of...
My dream is to build my own Hagn singleshot rifle:
http://www.martiniandhagngunmakers.c...hnicalinfo.htm
It's an absolutely brilliant design; simple and yet sophisticated. Extremely strong and not a single visible screw or pin - it was love at first sight
A few years ago I spent a lot of evenings constructing this 3D model based on the drawings and pictures on the website. I think I got it nailed pretty good, I have all the necessary machines at my disposal, CNC lathe and mill. Wire EDM and grinders, not to mention more than thirty years of tool making experience. Only thing missing is the time, but one of these days...