The product on this page is the mount by itself. The AR-F3 is the mount & the FastFire 3 sold together. Features: Simplest, most effective way to mount any FastFire sight on an AR flattop Allows the FastFire to mount at the optimum height, so the red dot can co-witness with flip-up sights Fits Weaver or Picatinny-style base Metal wings protect the lens from impact and unintentional abuse Lower compartment stores spare battery, open-end wrench, and TorxA(R) wrench