Designed with tactical shooters in mind, the XPS2-300 offers a 300 Blackout ring with 2 dots. This 2 Dot system allows the user to zero for subsonic and supersonic ammunition without changing any settings. This red dot is offered in the XPS2 platform, it is the shortest and lightest HWS sight available. Its size and weight make it convenient for hunters, military and law enforcement officers to carry. The single compact lithium CR123 battery configuration opens up more space on the rail for rear iron sights or magnifiers. Features Auto Shut Down at 8 hours.