Standard factory magazine for Glock pistols. Glock magazines feature a double-stacked construction and are designed with an inner steel frame and an outer polymer shell to prevent deformation, even when dropped from great height or exposed to extreme environments. The Gen5 series features an orange follower for higher visibility and mag catch notches on each side to accommodate left-handed shooters. This magazine is designed to fit G23 pistols and has a capacity of 13 rounds. It is compatible with any firearms that will accept Glock-style magazines along with smaller Glock frames that can accept double stacked magazines.