A simple throw lever I made for my Vortex Viper PST Gen2. It will fit any scope with an approximately 46mm zoom ring.  There is a fair amount of adjustment in the design so can fit slightly bigger and slightly smaller zoom rings. I have included the model files if anyone wants to customize it. I have a few friends with other scopes that want ones so I will include a few other versions here soon.

Hardware:

1x M3 20mm cap head screw

1x M3 nylock nut