EOTech XPS2-0 Holographic SightThe EOTech XPS2-0 is their shortest model sight yet. This sight is smaller and lighter than the other holographic weapon sights and runs on a single 123 battery. With the new single battery configuration, the XPS allows more rail space than ever, leaving more room for rear iron sights or magnifiers. Smaller, lighter and always fast; the XPS series is a great compact option for your platform. Single transverse 123 battery to reduce sight length Shortened base only requires at most 2 3/4 inch of rail space Battery cap and latch are eliminated and replaced with a simple O-ring, tethered cap; better sealing is achieved Average battery life at brightness level 12 is roughly 600 hours The XPS2 is not Night Vision compatible, for Night Vision compatibility see the XPS3 sights. EOTech XPS2-0 Holographic Sight