The Crimson Trace 3.0 MOA Ultra Compact Open Reflex Sight delivers superior clarity and intuitive target acquisition. This 1x red dot sight features a 3.0 MOA round dot reticle with multiple user-selectable brightness settings and an ambient light sensor for optimal clarity in any lighting environment. The fully coated lenses ensure lasting durability for reliable field performance in difficult environments. A notch cut allows for easy co-witnessing with iron sights, and a a reliable 20,000-hour (2+ years) battery life ensures lasting performance. What's more, this red dot sight is shock-, dust-, impact-, and fog-resistant for reliable performance in challenging environments. Manufacturer's lifetime warranty.Manufacturer model#: 01-01960. 3.0 MOA round aiming dot Micro Open Reflex Site Fits Shield RMSc or jPoint Platforms Multiple brightness levels Ambient light sensor Fully coated lenses Low-profile, snag-free design Shock-, impact-, and vibration-resistant High-efficiency LED 20,000-hour battery life (2+ years)