EOTECH OGL On-Gun Laser is offered in a standard power (MIL/LE) model. Powered by a single CR123 lithium battery, the OGL offers up to 9 hours of continuous run time. The all aluminum housing offers extreme durabilty and its compact size is similar to a standard deck of playing cards. The IR and Visible lasers are optically aligned so zeroing is simple and easy. The OGL has a unique sliding lever that controls the beam divergence of the IR illuminator, making adjustments from spot to flood fast and easy, even under pressure.