Recently bought a model 700 BDL. It is an older style rifle, made in 1972 with the older BDL stock. It is missing the front and rear sights. Did the BDL's from this time period have the hood on the front sight? Are the sights the same as the newer BDL's? I know the holes are, but is the sight itself the same or did they change? What about the rear sights?