Trijicon Reflex with #15 Throw Lever Flattop/Weaver Mount is dual illuminated and parallax free, the Trijicon Reflex sight was designed for close-quarter battles and is unrivaled in both speed of target acquisition and pinpoint accuracy. The Trijicon Reflex allows soldiers, law enforcement officers and hunters to shoot with both eyes open which is a critical advantage for those who must aim while moving, or in darkness. Accuracy is enhanced with its dual-illuminated reticle. A glowing tritium lamp ensures a bright amber reticle at night or in low-light conditions, while advanced fiber optics deliver ambient light to the aiming point during the day. Batteries are not required.