I'm brainstorming a build. A 1/2 round tapered and flaired barrel would be interesting to be. So is a half stock sort of like the KUNZ rifle being auctioned at Julia right now.
The under ribs I am seeing apper to have the radius cut for a larger diameter than the barrel I want to use. I see two possible work arounds. Hog out the rib, seems tedious. Or, change the diameter of the barrel, under the rib only, to match the rib. That seems doable.
My plan: Stick the rib in place with double stick scotch tape, mark the barrel with sharpie, file between the lines, to match the rib radius. Solder rib the the barrel?