Trijicon 100173 ACOG 5.5x 50mm Obj 18.40 ft @ 100 yds FOV Matte Black Finish Illuminated Red Chevron 223 BAC

The ACOG is internally-adjustable, compact telescopic sights with Tritium-illuminated reticle patterns for use in low light or at night. It combines traditional, precise distance marksmanship with close-in aiming speed. This model is designed for use with the M16 family, every feature of its mechanical and optical design was chosen for a single purpose: to provide increased hit potential in all lighting conditions, without failure prone batteries.