Aim-O 2x42 Red / Green Dot DesertThe 2x42 Red Green Dot with magnification 2x and a 42 mm lens, made by Aim O, is CNC machined from aluminum alloy and has a non reflective black finish. This full sized sight weighs 400g and is compatible with the standard Picatinny rail interface system. The item uses a 1 x CR2032 battery and is windage and elevation adjustable. The solid and robust product provides red (gives clarity on sunny days) or green aiming dot with brightness level