The Leupold 176011: VX-Freedom is a top-string optic that renders a sharp, defined image with consistent precision. This product boasts lenses that are resistant to scratches and a sturdy, waterproof and fog-proof 6061-T6 aircraft aluminum 1\" tube.Also integrated into the system is a twilight light management system for improved visibility in low light conditions. The stand-out feature of this model is the Custom Dial System (CDS) - a custom dial that gets rid of the necessity for holdovers. This system smoothly enables users to range their target, set the distance, and aim precisely.