The Midas TSR1 Red Dot Sight by Athlon Optics provides a fast and versatile aiming solution for nearly any close range set up. Its light weight and low profile makes the TSR1 a good choice for a back up sight to a magnified optic, and can even be mounted on select pistols by removing the picatinny rail mount and replacing it with an adapter plate (sold separately). In addition, the TSR1 has an automatic shutoff at 5 minutes and is motion activated making it always at the ready. Features of the Midas TSR1 Red Dot Sight: 50,000 hour battery life (medium settings) 5 minute automatic shut off Motion activation 10 illumination settings Compatible with select handgun models