The concept is simple; a durable scope with a clear illuminated reticle in light situations, without batteries using Fibre Optic technology. The ACOG TA31, with precise 4x32 Magnification ranges out well beyond maximum range for airsoft, air-rifle and rimfire applications, while remaining one of the lightest options available on the market. Not only this, but with the genuine Fibre Optic powered illumination, target acquisition is far easier and faster than any other 4x32 Scope available. The ACOG TA31 and RMR combo is the ultimate aiming solution for both Close Quarter Battle (CQB) situations and longer distance shots requiring additional magnification. This dual-sighting system gives the shooter a distinct tactical advantage with the option of the ACOG and the RMR Type 2 Sight. With the quick target acquisition of the RMR sight and the precise aiming capabilities provided by the magnified ACOG, the shooter has the ability to select the proper aiming solution for the situation at hand. Not only this, but you can also directly mount the RMR to any rail using the included adapter! Field of View (7 Degrees). Power: Fibre Optic Illumination (No Batteries Required). Power: 1x CR2032 (Not included).