Buy your Holosun HE407K-GR X2 Elite Green Dot Sight from BattleHawk Armory today! The Holosun HE407K-GR X2 is an open reflex sight with a green dot reticle color designed for concealed carry pistol applications. Holosun designed these Red Dot Sights with tons of their innovative tech like Super LED that delivers greater power efficiency when using high brightness settings. Speaking of settings, there are 12 total brightness settings, including two that are compatible with night vision. Another great feature of this Holosun 407K sight is Shake Awake Technology which powers the optic on when it senses motion and powers down when it does not, resulting in up to 50,000 hours of battery life.