Holosun HS407C X2 Red Dot 2 MOA Reflex Sight W/ Tool & Cloth Shake Awake. The HS407C X2 is an open reflex optical sight designed for full-sized pistol applications. The HS407C X2 improves on previous versions by adding Lock Mode which was first introduced in our 2018 LEM pistol optic models. Lock Mode, when activated, locks the buttons preventing inadvertent setting changes. Include Holosun's Red Super LED with up to 50k hour battery life, Solar Failsafe, precision 2MOA dot, and Shake Awake.Durable housing is made from 7075 Aluminum. Uses an industry standard footprint, and houses the 1632 battery in a side-mounted tray for easy replacement when needed. Power Source: Solar & Battery. Dimension (in): 1.78x1.15x1.15. Housing Material: 7075 T6 Aluminum. W&E Travel Range: ±50 MOA. AUTHORIZED SUREFIRE DEALER & VETERAN OWNED.