For AR and carbine shooters the AR-F3 combines the FastFire III sight with the rugged AR-F3 mount. It's the simplest and most effective way to mount any FastFire sight on an AR flattop as a standalone sight or as a co-witness for iron sights. The FastFire sits low in the mount. Metal wings on each side of the lens protect the sight from impact or unintentional abuse. A lower compartment offers convenient storage for a spare battery open-end wrench and Torx wrench. Fits any Weaver or Picatinny-style base. - Reticles: FastFire 3-MOA Dot - Reticle Color(s): Red - Clear Objective Lens Diameter: 21x15 mm - Finish: Matte - Mount: Picatinny Rail Base - Eye Relief: Unlimited - Click Value: 1 MOA - Elevation Adjustment Total Capability: 115 MOA - Windage Adjustment: 86 MOA - Parallax/Focus: Parallax-free - Length: 2 in. - Weight: 4.6 oz. - Illumination Control: Manual push-button & automatic brightness adjustment - Illumination Settings: 3 manual brightness levels; automatic setting reactive to environment - Battery: CR1632