The Holosun EPS 509 Pistol Series Miniature Enclosed Reflex Sight is a premium duty-grade optic built for hard-use pistols and slide-mounted applications. It features a circle-dot reticle system that allows fast target acquisition at close range while maintaining precision for longer shots. The fully enclosed emitter design keeps out dirt, moisture, and debris, ensuring a consistently clear sight picture in harsh environments. Constructed from ultra-durable titanium, the housing offers exceptional strength with minimal added weight. Solar Failsafe technology automatically adjusts brightness in varying light conditions, while Shake Awake preserves battery life by activating the sight instantly upon movement. Designed for reliability, durability, and performance, the HE509T-GD-X2 is well suited for defensive, duty, and competition use.