Leupold 171775: LEUPOLDmark 5HD w/M5C3 Adjustments - 5-25x56 - Tremor 3a 5:1 zoom ratio a Front focal plane a Side focus a Twilight Max HD Light Management System a M5C3 zerolock adjustments a 1/10th MIL click windage & elevation adjustments a Throw lever a Crafted from 6061-T6 aircraft quality aluminum a Dial illumination control a Non-locking European style fast-focus eyepiece a 35mm main tube a Argon/Krypton purged for enhanced thermal shock resistance a Waterproof & fogproof a Flip open lens covers a Matte black finish a Wt.: 30oz.