This Leupold VX-R 3-9x40mm scope with FireDot Wind-Plex reticle features a CDS custom dial system, quantum optical system, index matched lens system, 2nd generation argon/krypton waterproofing, generous eyebox, firedot push button illumination, blacked lens edgs, twin bias spring erector system, one turn extended range focus, motion sensor technology, tactile power selector, and 6061-T6 aircraft quality aluminum.