Trijicon Rifle Scope, 6x48.308/7.62 Red Horseshoe Reticle

  
This is due to the tritium/fiber optic illuminated reticle found in most Trijicon ACOG riflescopes, this automatically adjusts illumination of the reticle based on available light. With a wide array of magnification levels, reticle designs, and reticle colors available - there truly is an ACOG for every mission.