Athlon Optics 10x42 Talos BTR Gen2, SFP APRS2A, .1 MIL, 30mm Tube Fixed 10x magnification 42mm objective lens 30mm aircraft-grade aluminum tube Exposed turrets Precision zero stop High-precision erector system 3.6" eye relief 10 yds to infinity side parallax adjustment 11.5 feet field of view at 100 yards 0.1 MIL Click Value 6 MIL adjustment per rotation 35 MIL total elevation adjustment 35 MIL total windage adjustment 13.3" long 24.6 oz APRS2A SFP (Second Focal Plane) MIL Etched Glass Reticle Fully-multicoated lenses One-piece tube Waterproof Fog proof Shockproof Nitrogen purged Lifetime warranty