Fits EOTech 556 and 557 only. "Zombie Killer" Model Since we introduced our original patented EOTech Lens Covers for the 551 and 552, our customers have been asking us to develop models that would fit the other EOTech models. In order to meet the many EOTech configurations, provide easy installation and keep the price point competitive, we decided to offer these super lens covers with a new enhanced 6061 T6 aluminum hood in a combo package. The New GG&G EOTech Hood And Lens Cover Combo Package is easy to install. You only have to remove the EOTech hood and install the new hood and lens cover combo. The new GG&G hood is Type III hard anodized matte black to mil-spec and matches the original EOTech finish. All of the windage and elevation calibration markings on the new hood are fully engraved and present an off white appearance to make it easier for the end user to reference. The lens covers in the New EOTech Hood And Lens Cover Combo Package provide the same great features as the originals. They are spring operated so that once pressure is applied to release them from the closed position, they spring open. The rear cover lays across the top, so as not to interfere with the field of view. The front cover opens and serves as a sun shield. However, if heavy brush etc. is encountered, the front lens will fold back so that it is not damaged. Because of the contours of the EOTech body, these rifle scope lens covers are not 100% waterproof, but they do prevent most dust, debris, rain and snow from accumulating on the lenses. These unique lens covers for scopes can be easily operated with either hand to provide flexibility of operation. The new combo design and methodology is so unique that we were awarded a patent. These new models of the GG&G Hood And Lens Cover Combo will fit EOTech models 556 and 557. As with all GG&G products, the New Hood And Lens Cover Combo for the EOTech are made in the USA.