Sure. . . I have red-dots on a few rifles and a handgun or two, but on every last one I like the idea that my irons are gonna hit exactly where my dot sight was, in the case that something were to happen to the red-dot (i.e. hard drop, using gun as a club, water or the rare battery fail).
You really want those irons and know how to use them WELL, especially since the AK is such a short ranged gun. Irons (good ones) should be your primary sights. Anything else is auxiliary. . .