Easy to install and operate, the GG&G Lens Covers for the EOTech Holosight fit between the EOTech protective hood and the body of the EOTech housing. They are spring operated so pressure must be applied to release them from the closed position. The rear cover lays across the top, while the open front cover serves as a sun shield to enhance the Holosight dual reticle. These lens covers can be easily operated with either hand to provide flexibility of operation maintaining access to the controls and battery compartment. The lens covers will fit the EOTech 511, 512, 551 and 552.