Maximize the efficiency of magnification transitions with fluid precision using Vortex's SV-2 Switchview Throw Lever. 

The Switchview attaches and detaches easily to the magnification ring. 

Constructed of skeletonized, lightweight, hard anodized aluminum, the Switchview is one tough accessory that will serve you well. 
 
Viper XBR crossbow scope
 
Razor HD riflescopes with a rubber magnification ring
 
Viper riflescopes with a metal magnification ring: 
>> PST models 
>> HS-T models 
>> HS LR models 
>> HS models