I have a book here from Paul Wahl called the Carbine Handbook that details the way to do up one of these guns. Also how to make a pump rifle out of one. It was a 1964 printing with a copy in 1974 and I bought it in 1984 or so. I personally created a couple of these pump rifles for people and they were thrilled. I was part of the time when these guns were cheap and plentiful and not really desireable. I could tell the difference in them and knew some were better to hold on to then others. Unfortunately I was making about $4000 a year so this wasn't an option. I miss those times but one can't turn back time. All the same, the one pictured is neat...just not my thing.