The Holosun HE509 ACSS Vulcan is an enclosed reflex optical sight designed for pistol applications. Features include a Titanium housing, Holosun’s Super LED with up to 50k hours battery life, Multi-Reticle System, Solar Failsafe, and Shake Awake. This X2 version adds improved glass clarity, Lock Mode, and a full Multi-Reticle System providing 32MOA circle with 2MOA dot, dot only, or circle only reticle options. This model comes with the ACSS Vulcan reticle and an RMR footprint plate for pistol mounting. The revolutionary patent-pending ACSS Vulcan reticle provides a large circle guiding the eyes towards the 10 MOA center chevron, eliminating one of the biggest challenges for shooters new to slide-mounted red dots. Don’t need the circle? It can be easily deactivated to extend the battery even further.