Holosun HE407K-GR-X2 Reflex Sight Green Dot 6MOAThe HE407K X2 is an open reflex optical sight designed for concealed carry pistols. The X2 has been redesigned with the addition of Lock Mode. This mode locks the buttons preventing inadvertent setting changes. The buttons have been redesigned to compliment Lock Mode by placing them lower and out of the way. The HE407K features a dot reticle and 12 different brightness settings, 2 of which are night vision compatible. This sight provides parallax free