The Holosun HS507C-X3-MRS is a reflex sight built around an RMR footprint with a Multi-Reticle System offering a 2 MOA dot, a 32 MOA circle, or a combined reticle. Automatic brightness control uses Solar Failsafe to help manage illumination as lighting changes, while Shake Awake supports ready-on operation. It runs on a side-tray CR1632 battery rated up to 100,000 hours and includes memory and lockout functions. Built with a 7075-T6 aluminum housing, Super LED, and multilayer reflective glass, it is rated IP67 waterproof and 5000G vibration resistant.