Ayem, here. let me know what your intended use may be

by Paul , Tuesday, March 17, 2015, 15:50 (3479 days ago) @ John Meeker

I've got an old Mossberg 42 M(c) cached up north. It came with a side mount for a 3/4" scope and a junk scope in the rings. It'd be kind of cool to set it up with iron sights one of these days. https://www.havlinsales.com/22rifle.htm has a peep rear which would probably work with the original front sight. Oops. Come to think about it, I'm not sure it HAS a front sight...

Probably paid too much for the rifle back when. It'd still be cool to restore it with iron sights and a good magazine. Magazines for it are few and far between, and priced high to boot.

So I'm trying to figure out if your description fits into some kind of replacement sight that would work on the old plinker, or not. The "mil spec" is what caught my attention as some of the Mossbergs were used as military trainers, if my memory does not deceive me in the matter.