The Trijicon ACOG 1.5x16S Scope is a fixed magnification riflescope with an illuminated reticle pattern for use in any lighting conditions. Dual illumination provides two sources of battery-free illumination - fiber optics and tritium. The fiber optics use ambient light to automatically adjust the brightness level and contrast of the reticle to available light conditions. The tritium-phosphor lamp glows in low-light conditions. The ACOG body is designed to be extremely rugged and reliable. Wrapped in a smaller package, at 5.1 ounces (without mount), this ACOG is perfect for fast-moving tactical teams operating in close quarters or for speed-oriented competition venues. The forged 70 Mfg: Trijicon