The Holosun Technologies HE509T-X2-GD is engineered for demanding environments, featuring a robust, nitrogen-purged design ideal for handgun applications.This versatile LED sight ensures precision with multiple reticle options and a long-lasting battery, making it an essential tool for accuracy in the field.MRS: Circle DotDot OnlyCircle OnlyUp to 50,000 Hours Battery Life (Setting 6)12 Brightness Settings: 10 DL and 2 NV CompatibleEnclosed Design and Titanium HousingConvenient Tray Battery CompartmentParallax-Free and Unlimited Eye ReliefIncludes Adapter Plate for RMR FootprintsChoose the HE509T-X2-GD for durability and advanced optical performance.