The UTG New Gen 4 MOA Red/Green Dot Sight is an incredible quick aim electronic dot sight with red/green dual illumination that beats any that you've ever seen! The sight has a 38mm tube with a Best in Class emerald lens coating for maximum brightness and clarity. It features consistent and precise coin-adjustable W/E knobs with 1/2 MOA per click increments and optimal brightness settings for variable shooting environments. Includes integral Picatinny mounting deck and flip-open lens caps. Don't keep using that tired, old ineffective sight you've been struggling with! This is what you need, right here!