Enclosed Emitter Optic with Ruggedized Miniature Reflex Footprint: An enclosed emitter optic built on the industry-standard Ruggedized Miniature Reflex footprint, the Osight XE AMRS offers rugged environmental protection and broad seamless full-size and compact pistol compatibility. Industry?s First 2/6+32 MOA Advanced Multi-Reticle System (AMRS?): Switching between a 2 MOA dot, 2 MOA dot + 32 MOA circle, 6 MOA dot, 6 MOA dot + 32 MOA circle, and 32 MOA circle ¡ª you can tailor your aiming solution to any shooting scenario. Side-Loading CR1632 Battery: Effortless battery replacement without removing the optic ensures hassle-free re-zeroing. A high-end CR1632 battery offers easy accessibility while maintaining steady performance. Industry?s First Collapsible Backup Rear Sight (CBRS?): The integrated, collapsible rear sight serves as a reliable alternative in case the optic is powered off. With a quick press of the pop-up button, you can have a backup sighting system that ensures you can maintain your accuracy and continue shooting effectively. Aspherical Lens: The aspherical lens ensures zero distortion, parallax-free performance, and exceptional clarity for rapid, precise target acquisition. * Click here to learn about our compatibility.