EOTech’s EXPS3 is a professional-level Holographic Weapon Sight optimized for shooting with both eyes open and fast target acquisition. Its compact profile maximizes rail space, allowing the user to install other accessories such as magnifiers, flip-up iron sights, tactical lights/lasers etc. The universal mount is compatible with any MIL-SPEC picatinny rail, and a 7mm raised quick-detach base accommodates a lower 1/3 iron sight co-witnessing option. The EXPS3 features side buttons for switching between the optics 20 daytime brightness settings, and a side loading battery compartment allows the operator to change the battery without removing the optic from the host weapon. Features: Compact profile Convenient side buttons Side-loading battery compartmentQuick-release mount EOTech EXPS3-1 Tan Holographic Sight w/1 MOA Dot Side Button & QD STS Mount EXPS3-1TAN