Tenebraex Vortex Viper PST 4-16x50 and 6-24x50 ARD flip cover compatible VV0050-ARD is an anti-reflection device that is built especially for Vortex Viper PST 4-16x50 and 6-24x50 scopes. It provides protection to scope optics. Tenebraex VV0050-ARD has anti-glint capabilities that helps protect the optics glass from factors like sand, dirt and grime. It has a unique geometry along with a cutting-edge honeycomb material to hide reflections from optical surfaces. Adding to that is its ability to safeguard the lens from scratches and damage. The ARD from Tenebraex serves as an inexpensive, retrofittable, field-practical way of cutting down objective lens glare and reflection. Tenebraex Anti-Reflection Device (ARD) for 50mm Swarovski, Leica and Vortex Scopes VV0050-ARD