Upgrade your Leupold MK4 Illuminated Reticle optic with one of our throw levers, speeding up magnification changes and target engagements without breaking the bank. This lever fits Leupold Mark 4 optics with illuminated reticles. For non-illuminated reticles, please see the standard Mark 4 lever. Our levers are proudly printed in the USA from durable TECH-G polymer, and feature a metal thread insert for increased strength when tightening. Easily installs in a minute or less, and has a lifetime warranty.