For auction, Matech OGU83  BUIS ranging rear sight. Sight is military issue, take off from upgraded US Military issue weapon, in lightly used, overall very good condition - excellent, see pictures. Made of steel, black finish, fits any MIL-STD-1913 rail, Picatinny rail. Marked on bottom “Matech” and OGU83. Back up sight when removing or using without handle, can be used and co-witness with Eotech or other prism and red dot sights, has flip up aperture. Sold as shown, sold as is.