The Barska 4-16x 50mm IR Tactical Rifle Scope FFP with Trace MOA Reticle is the top choice for shooters who are serious about precision optics with unrelenting reliability. The rifle scope's glass etched trace MOA IR reticle is set in the first focal plane so as you increase the magnification, the reticle will increase in size for accurate range estimation at all magnification levels. The rifle scope's reticle illuminates in red and green with five brightness settings for each color, with only the center of the crosshair illuminating to prevent potential washout of your target and sight picture. The side focus adjustment on the rifle scope will focus from 10 yards to infinity eliminating any parallax issues. The large 50mm objective lens provides impressive low-light clarity, and all air-to-glass lenses are fully multi-coated for superior light transmission. For accuracy and reliability shot after shot, you can count on this tactical rifle scope.