Athlon Optics 4.5-27x50 Ares BTR Gen3 HD, FFP APLR13 IR MOA Reticle, 1/4 MOA, 30mm Tube 4.5-27x magnification 50mm objective lens 30mm aircraft-grade aluminum tube Exposed turrets Precision zero stop HD Glass High-precision erector system 3.9" eye relief 25 yds to infinity side parallax adjustment 22.7-3.8 feet Field of view at 100 yards 0.25 MOA Click Value 25 MOA adjustment per rotation 80 MOA total elevation adjustment 80 MOA total windage adjustment 13.8" long 27.3 oz Illuminated reticle Etched glass reticle Advanced Fully-Multicoated lenses XPL protective coating Waterproof Fogproof Shockproof Argon purged Lifetime warranty Made in Japan