UTG New Gen 4” Tactical Red/Green Dot Sight, 38mm Tube, 4MOA Target Dot, Complete with Integral Picatinny Mounting Deck with Double Locking Nuts and Flip-open Lens Caps. Leapers/UTG's dot sight is designed to offer a crisp dot for professional precision shooting. By design, a reflex sight will more or less have coma effect due to the spray rays and minor ghost image caused by reflection. In general, due to the contrast, the brighter the target background, the crisper the dot appears and the least amount of ghost image will show. In addition, lowering the illuminiation intensity setting will lessen any ghost or spray imaging.