The Trijicon Reflex is a nonmagnified, self-luminous sight engineered for increased light-gathering capabilities. Its 42mm lens gives you the largest sight picture possible. Using innovative fiber optics, it adjusts the available light by automatically adjusting the brightness and contrast of the reticle. Parallax-free sighting enables fast, both-eyes-open target acquisition and accurate aiming. A Tritium Phosphor Lamp makes the 6.5-MOA amber-dot reticle glow for quick targeting without any batteries, and it has a guaranteed life of 15 years. Military-grade aluminum-alloy housing with adjustable windage and elevation. True-color 28-layer coated lenses for premium light transmission. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Electronic Sights.