Passive Single-Dot Reticle Optical Sight.  Low-profile, Allen-screw Mounted Optic.  Great for Shotguns, Tactical Rifles, Rimfire Rifles and more. Shock-Resistant.  Superior Water Resistance.  Variable Dot Reticle Colors:  Read and Green.  Multiple MOA:  Dot Reticle can be adjusted to several different intensities/diameters.  Please note:  This optical sight is a one power (1X) device which does not magnify the target.