Low profile snag resistant design; Shroud protects aperture from debris and impact damage; Dual peep, same plane aperture allows for perfect co-witness; Unique closure with either aperture deployed; Can fold to the rear, the correct direction if dropped; Sight works in conjunction with all standard height front sights; Manufactured using a specially developed Military Grade reinforced, super tough polyamide; Rail clamp nut has been redesigned so that there is no spin out when overtightened; All plastic components have been changed to a higher strength material; Retaining pin for the cover has been redesigned so that the pin does not slip out of position