Hello, this is my first post on this forum and I hope I can get some help with my question. So a few months ago I bought a MK1 micrometer sight off ebay that was in less then stellar condition (rusted and seized) so i removed the rust and got it moving only to find that someone had added some sort of aperture reduction piece to it which didn't allow it to move down to the 200 yard mark. What I'm wondering is, is this something long branch did or is this some aftermarket piece that someone hammered into the slide and I would be safe in drilling it out.



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