Nice rear sight that is completely free of any rust, pitting, or damaged parts. The leaf is in mint never used condition. The slide moves along the leaf effortlessly, no binding along the entire length. When placing the leaf onto the base, the leaf rails rest perfectly on either side of the center block on the base. The binding knob is in perfect working condition and not bent as is the case with many of these. The base is in mint condition which means the teeth on the front will allow your windage knob to move the sight from left to right without slipping which messes up the treads on the windage knob shaft. Every part of this rear sight is USGI, no reproduction parts and no junk. Don't waste your time and money buying worn or reproduction junk at a ridiculously high "buy it now" price.