The FastFire Mount was designed to work with the Burris FastFire and similar optics. It features a built in non-adjustable rear sight notch that will provide a 1/3 lower co-witness. The rear sight is machined to “P” or 300m on most AK variants. This mount comes with 4 screws to mount your optic.
Blemished mount typically have one or two white dots on top side of mount. See pictures for example.