Mueller APV 4.5-14 Switchview™ Lever
[SVLVXIII]

I was skeptical about the usefulness of this lever for anything other than 3 gun.
After getting used to the lever for a couple of days I took the rifle on a rodent hunt and found the switchview lever to be an invaluable tool for the fast and furious target acquisition and shooting that’s involved with varmint shooting.
I now have a Switchview lever on all my rifles and can’t imagine shooting without one.