Just as optics on long guns are commonplace, pistol-mounted optics are on their way to becoming one and the same. With the benefits obvious and handguns the primary option for on-the-go and on-your-person defense, UTG OP3 Micro reflex dot sights are your next choice for reliable, affordable pistol-mounted optics, with different models tailored to the unique needs of various shooters. Features : Red 4 MOA Single Dot 8 Brightness Settings 15,000 Hours Battery Life Side Loading Battery Compartment 1 MOA Adjustments Includes Removable Low-Profile Picatinny Mount RMR Footprint Specifications Reticle: 4 MOA red dot Footprint: Trijicon RMR - mounts to any RMR-pattern optic cut or plate Finish: Black Platform: Pistol optic (also mounts on a Picatinny rail with a suitable adapter) Confirm your slide carries an RMR-pattern optic cut, or that your adapter plate is RMR-footprint, before ordering - optic footprints are not interchangeable.