Leapers CQB Dot Sight is a quick aim electronic dot sight with red/green dual illumination. The 38mm tube comes with emerald lens coating for maximum brightness and clarity. This model includes an integral Picatinny mounting deck and flip-open lens caps. Features: Quick aim electronic dot sight with red/green dual illumination 38mm tube with best in class emerald lens coating for maximum brightness and clarity Consistent and precise coin-adjustable with E knobs with 1/2 MOA per Click Increments Clear and sharp 4.0 MOA dot Optimal brightness settings for variable shooting environment Great field of view and unlimited eye relief Adjustable illumination knob on the Ocular tube for red, green or black reticle, different levels of brightness for diverse weather/light conditions Magnification of the scope is fixed Infinite parallax setting Infinite eye relief