EOTech EXPS is a series of Red Dot Sights that have been custom-tailored for the needs of end users. Building on previous successes, EOTech has refined the Extreme-XPS red dot holosights based on input from military, law enforcement and shooting enthusiasts. Like all holographic sights, the EOTech EXPS series offers instinctive two-eyes-open shooting, ideal for military and police who need to remain aware of what's happening around them. These EOTech Red Dot Scopes are powered by a single transverse battery, housed in a cantilevered battery compartment meant to rise above the delta ring on standard black guns. These holographic scopes take up a mere 2 3/4" of rail space, leaving plenty of space for magnifiers, iron sights, and any other gun accessories you need to mount. EOTech has made the EXPS Holosights capable of running up to 600 hours on a single CR123 battery. Side-mounted buttons give easy access to the reticle brightness controls, and a quick-release lever lets you easily attach and remove your EOTech EXPS Scope. EOTech EXPS Reflex Sights are ideal for tactical operators in the military or law enforcement, or anyone else who needs serious accurate sighting power.