Holosun Black Anodized 1x 2 MOA/32 MOA Red Dot & Circle Reticle The HS507C X2 is an open reflex optical sight designed for pistol applications. The X2 Series pistol optics features Lock Mode, when activated, locks the buttons preventing inadvertent setting changes; buttons have been redesigned to compliment the Lock Mode by placing them lower and out of the way; Holosun's Super LED; 50k hours battery life, Solar Failsafe, Multi-Reticle System and Shake Awake. Includes T10 L key, CR1632 battery, lens cloth and user manual.