The VXFreedom is a bestinclass optic that produces a crisp clear image with repeatable accuracy. It features scratch resistant lenes 6061T6 aircraft aluminum waterproof and fogproof 1 tube and a twilight light management system.The Custom Dial System CDS model features a custom dial that eliminates the need for holdovers. Simply range your target dial the distance and aim dead on.This model has a 39x magnification with a 40mm objective Duplex reticle and black matte finish.