For AR and carbine shooters, Burris offers a complete package with the AR-F3 Flattop FastFire Sight. This bundles a FastFire II with 3 MOA dot and rugged protective mount that's range-ready right out of the box. It's the simplest and most effective way to mount the FastFire III on an AR flattop as a stand-alone sight or as a co-witness for your iron sights. The FastFire sits low in the mount and a pair of metal wings on each side of the lenses protects the sight from impact or unintentional abuse. For added convenience, there is a lower compartment for spare battery storage, open-end wrench and Torx wrench. Fits any Weaver or Picatinny-style base.