This high quality ACOG style dot sight won't let you down when you need it most. Constructed fully from metal, this red/dot sight is extremely durable to the hardships of airsoft warfare. The integrated weaver/picatinny mount allows you to easily mount this dot sight on any airsoft gun that has a 20mm rail. This scope is perfect for M4/AR15 variants because it is elevated just enough to clear a standard CQB style sight. Both red and green illuminated reticles are offered to provide optimal visibility in all light conditions. Typically, the red dot is more easily visible during the day while the green colored reticle proves extremely useful during night time skirmishes. Front and rear iron sights are built-in to this dot sight to give players an additional aiming option based on the circumstance. If you're looking for a new versatile optic sight for your AEG you can't go wrong with this full metal ACOG style dot sight.