These are the official, Genuine Air Force sunglasses from American Optics, the leading supplier to the U.S. government. The lenses are scratch-resistant true color glass, meaning the grey lenses do not distort the colors you see through them. They also offer 100% UV protection, protecting your eyes from the sun's harmful rays. As you can see, the ear pieces are bayonet style.
This pair has Black frames and 52mm lenses. Larger 57mm lenses are also available, as are gold or silver frames.
Ship with the black case you see pictured.