TRUGLO Dual-Color Multi-Reticle Open Dot Sight All the features of original Dual-Color dot sights for those who dont want a tube, wide sight window with thin frame makes the optic housing nearly disappear from view while your dot remains on target Two choices of reticle color for contrast against any target / background (red and green) Durable/compact design; unlimited eye relief; wide field of view 24 x 34mm window for ultra-fast target acquisition with anti-reflection coating on target side Parallax free from 30 yards; integrated Weaver-style mounting system