many gunsmiths even work on these to be honest, you
Probably right. My gunsmith said he has never took one apart. Looks like you got to have a gaget to hold back the firing pin spring while turning the handle and off it comes. Might be tough to reassemble however. They do have some pins (knocked out with hammer) in the bolt face that might have to be knocked out. And this wierd straight screw on the bottom on the sleeve.