I don't think you can have an optic on an AK (apart from maybe a PKA-S if you're lucky)
In airsoft there is a
reason to have an optic on an AK, since the externals are largely cosmetic, thus with similar internals to other weapons, an airsoft AK47 can be as accurate as any other rifle, but in terms of a realistic - or even aesthetically pleasing - look, I completely agree that an AK looks preposterous with an optical sight on it, it's just not what the AK47 is about. It looks about as right as putting a telescopic sight on a shotgun would.
The AK47 is an
assault rifle - it was never intended to be a super-accurate weapon, it's designed to be operated by troops with limited training, specifically for peppering fire at the bad guys to keep their heads down whilst your comrades move up into grenade tossing range, - i.e. it is
a rifle for making an assault with. In fact, in Soviet doctrine, the AK is pretty much regarded as a disposable weapon if need be, which is hardly the thing you'd do if it had, and could make use of, an expensive optical sight. Even the SVD, which
was designed to use an optic, was never regarded as something which would always make one shot kills, that's why the Soviets made the SVD a semi-automatic weapon. At the time the SVD was considered unusual by Western analysts for what they regarded as a 'sniper rifle', when in fact it is - and always was - a squad marksman's rifle rather than a sniper weapon, intended to be deployed in fairly large numbers at section level. The Soviets have always been pragmatic realists when it comes to their military, well aware that intricate plans almost always go awry the moment the shooting starts, thus their doctrine is about fielding large numbers, ease of use, ease of production, and weight of fire. It's rarely, if ever, been about pinpoint accuracy.
Putting an optical sight on an AK is like putting a set of spoilers on a milk float.