HD101 Red and Green Dot Sight 1.Obj.aperture:33mm 2.Field of View:15.8m@100m 3.length:82mm 4.Weight:115g HD101 Red and Green Dot SightSpecifications1) 5 or 7 levels brightness adjustment red/green dot sight.2) Parallax free.3) Anti-glare reflective coating on front lens.4) Fully adjustable windage and elevation.5) Easy hook up QD mount.6) Low power consumption.7) Lightweight and compact design, ...