no,the effective range IS the accurate range,a gun isnt effective if it isnt accurate anymore and above 1000m ,the SVD is anything but accurate and the projectile wont move 3000m.
The AK 47 is no way better then the M4 and M16 (atleast against A3 and A4 series),maybe the AK got a bigger projectile,but that means more recoil,so its a 1:1,AK is longer then the M4 so it worse commando weapon but better for long ranges then the M4,its shorter then the M16 and so looses accuracy on long range,so it isnt good for either,long range or short range.
It has a pretty low ROF compared to the theoretical of the M16A2 and A3 (burst fire only) and also a lower ROF then the M16A1,M16A4 and M4
The AR15s weigh all less then the AK47 and also against its newer variant ,the AKM,the reliability isnt that important as both got a pretty high one.
We also cant argue about the sights (ring or combed),cause both are accurate and its about what the shooter prefers.
The SVD isnt any better as the MSG90 as the MSG90 is made with modern techniques and so is more reliable then the SVD,range was already said and HK are one of the best gun manufactures around,so I dont think that there gun will be less reliable then a 40 year old rifle.
Anyway,atleast your russian guns are a lot more classical because of all the wood and look a little better,also is it easier to identify the roots of the AK then the roots of the G3 even as both are directly based on the stg44,so in terms of hotness atleast the AK wins against the AR15
Oh,and Metal nor this Polymer plastic are fragile,wood is more likely to break then Polymer and metal was metal,good comparisation