The GG&G AK-47 Ghost Ring Sight is a terrific sight upgrade for your AK rear sight and it is easily installed-replacing the rough, factory-furnished U-notch-blade rear sight with a Ghost Ring giving you that faster, more precise sight alignment. FeaturesEasy installationThe perfect sight upgrade for AK pattern riflesReplaces the U-notch rear sight with a Ghost Ring aperture for faster, more precise sight alignmentRear aperture size of .200"Uses the original elevation slide, and is a direct replacement for the original AK rear sightAll edges have been deburred for the shooter's safetyWeight: 800 Meter 0.5 oz