I have a Wards model 46 handed down since my grandfather and would like to get the right parts before passing to a grandchild some day. I see reference to a Mossberg 42, but cannot pinpoint which variant.It has a place for a peep mounting but I have never seen it. I would like to add one.The original mag does not lock in either. Can this be fixed or do I need to buy a mismatch new one? This is by far the most accurate rifle I have ever used and have sent thousands of rounds through it as a kid/young teen.