That gun is no longer in military condition. The armory did not install such sights. In fact, I THINK that particular sight requires that some wood be cut-away, thus making it impossible to return the stock to as-issued configuration, even if you were to replace the missing metal parts, and, the correct military rear sight for that model (M1896C) is a $500+ item!  If you want a virgin, walk away, and, before you go any further - BUY THE BOOK!!!!!!!!! (the North Cape Krag book is NOT perfect, but you cannot do any better for $20).