What is the TE & MW of your barrel, & do you want to sell the barrel? Your IHC should have a LMR bbl.
Quite probably it was built up to match rifle specs by a competition shooter, it is NOT a Type I or Type II NM M1, as those were all built on SA recievers.
Enjoy a good shooter & try to find the right barrel for it.we have a Type II that could stand a better proper bbl.
da gimp
OFC , Mo chapter