The EOTech 558 Clone Holographic Red Dot Sight is the shortest model available from EOTech. It runs on a single CR123A battery which provides up to 600 hours of continuous runtime at setting 12. The EXPS leaves tons of rail space available for mounting flip-up iron sights or a magnifier and the integral mount allows for use on either a Weaver or Picatinny-style rail.
It is made of metal, feels very comfortable and is highly wear resistant. Requires x1 C123a rechargeable batteries. The color of the sight can be switched from red to green at any time. The adjustment of the sight can be adjusted at any time as well, alongside the brightness of the hologram.