OSS,
Most of us call it a "cross eyed stock". If you need one, you are lucky to have found it, they are pretty rare. For a front sight, check with New England Custom Guns. We can likely give you some information about it, but you need to post photos of all markings, especially proof marks on the bottom side of the barrels. If it is 8mm there are several possibilities for the nominal chambering. If it is 8x57R, there are still at least 3 possibilities. You may need a chamber cast to sort it out, but maybe not. I think you are in for a lot of fun.
Mike
