The Osight SE MOS is the first and only enclosed emitter red dot optic that mounts directly to the Glock MOS footprint without the need for an additional adaptor plate! A breakthrough design that has a lot more under the hood than just a new way of mounting to the slide, the Osight SE MOS also includes a side-mounting battery with over 85,000 hours of run time, 10 total brightness settings, and multi-reticle options to choose from: circle-dot, circle, or dot.