ohhunt 4 MOA Red/Green Reticle Reflex Red Dot Sight with Cantilever Picatinny MountShockproof and water resistant, the gun sight can hold the recoil and keep zero well Loop top prevents the lid of the dot sight windage elevation adjustment would not be lost Come with cantilever mount which fits for 20 mm rail, the sight is easy to install 5 illumination intensity, red or green dot sight, you could select different type to meet your need The dot sight is equipped with removable, spring loaded flip lens cover Material: high strength