The Holosun HS506 is a 30mm Reflex Sight created with your rifle or PDW in mind. With Shake Awake™, the user-programmable LED shut-off technology that wakes with the slightest movement, and you have one of the most battery efficient reflex sights on the market. Topping it off is T6 Aluminum housing and a multi-reticle system making this a must-have optic for any rifle or PDW.