Trijicon ACOG® 3.5x35 Dual Illuminated Red Donut .223 BAC Reticle

Advanced Combat Optical Gunsights. Fiber Optic provides daylight illumination and tritium illuminates reticle at night. Internally-adjustable, compact telescopic sights with tritium illuminated reticle patterns for use in low light or at night. Dry nitrogen filled with true aerospace pneumatic seal designed for unsurpassed waterproofing.