It could well be that only the stock needed replacing. The hardware itself was fine. One thing I've noticed about the Russian SKS, in particular, is the relative lack of soldier markings on the stock to be found. Stock artwork, ranging from simple notches to crests, etc is not uncommon on other C&R military rifles. I think stocks that had any artwork applied by a bored soldier or were just beat up were scrapped and that may have been the extent of the refurb.