Thanks, I appreciate your response.  I have two ways I can go with the sight.  I have a 1901 carbine sight that is missing the slide assembly.  Obviously I would have to find the slide.  I also have enough parts to build up a 1902 carbine sight which I may end up using as I have a correct reproduction hand guard.  My stock is the later replacement stock and not the original short forearm saddle bar stock.  However the 1902 sight does sound interesting.  I just joined the forum and will probably become a paying member and after that post a WTB in the classifieds as finding an original barrel would be great.  Thanks again