Product Description C-MORE Systems’ ATRW Railway Red Dot Sight with 12 MOA packs a rugged build into a lightweight body while maintaining quick and accurate target acquisition. Decide you need a different dot size? The ATRW features Interchangeable Dot Modules (sold separately) that are quick and easy to change out whether you need a lower or higher MOA. Out of the box, the sight is immediately ready to mount via a Weaver or Picatinny rail base with the attached clamp. The Railway sight has a preinstalled Tactical Spacer Kit, providing a lower third co-witness. The Click Intensity Switch has 12 adjustable positions, the first is power off, second and third are for night vision, and 4 through 12 provide different light intensities depending on environmental lighting conditions. From the Manufacturer Built for speed, these High Performance red dot sights will take your shooting ability to the next level. By using a single red dot as an aiming point, target acquisition is as simple as point and shoot. The unique Heads-Up-Display (HUD) design provides an unlimited field of view, while eliminating obstruction and tunnel vision common to tube style scopes. The Tactical Railway sight quickly attaches to the Picatinny rail on a Flat Top AR style rifles and carbines and is set at the correct height for co-witnessing with the weapons iron sights.