In a class by itself, the EXPS3 offers true two eyes open shooting for fast target acquisition, as well as 7mm raised base for iron sight access with Night Vision capability. Designed for less space on the rail. Side buttons and an adjustable, locking, quick-detach lever for easy installment make this and excellent choice not only for hunters but professional such as the U.S. Special Operations Command (USSOCOM), which has standardized on the HWS as its weapon optic for close quarter battle. Features QD lever for Weaver or MIL-STD 1913 rails, repeatable to within 1 MOA after re-mounting, 20 day illumination settings and 10 NV settings, takes 1 123 lithium battery with a life of 600 contin Mfg: Eotech