If I were to open a NIB Lyman 1A cocking piece sight for the Mannlichers, what would I find in the box? I'm sure there would be an instruction sheet of some sort, and the sight, but what else? I've seen references to a "nut" being part of the deal, but I don't have any idea what the term nut means in this case, or what it looks like.

Can anyone describe the installation of the 1A cocking piece sight on a rifle? Can anyone share pictures of one installed?