Since I don't know, I'll go ahead and ask the stupid question. Will a 110 barrel thread into a 1920? Or for that matter, can a 340 barrel be made to work?
Don't those two rifles utilize V-threads, which begs the question "Would a post-mil 99 barrel fit a 110?" All those new fangled post-war designs have escaped my attention.
nope they're not even close;
post-mil 99 = .8955 x 12 tpi
110 (small shank) = 1.055 x 20 tpi
And I get that this is not germane to the original question (..and I know germane, my last name is Germain), just trying to add some levity