Gun owners back then were no different than now. Customizing your guns is something many enjoy. Now anyone can do it much easier with all the "drop-in" parts available(look at all the stuff for a 10/22 or a 1911). Back 75 years ago you had to be handy or take it to a gunsmith. Your rifle had alot done to it. This is not good or bad, it just makes your gun a one-of-kind rifle. Enjoy it.
Just walking on the edge of of my grave.