Full Elevation adjustment, tool required; Low profile snag resistant design; Shroud protects front post blade from debris and impact damage; Accepts any standard front post blade; Can fold to the rear, the correct direction if dropped; 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; Metal Front Site Post