4x magnifier from Aim-O. Made of Aluminum. The magnifier has a pleasant eye relief and a magnification of 4x. By means of the QD (quick detach) system you can assemble and disassemble this magnifier in no time. The magnifier can be folded to the side to make it easier to hit targets at close range. This is done by means of a spring tensioned clip. The Aim-O magnifier can be adjusted both horizontally and vertically. The magnifier is equipped with 2 flip up lens covers.