I did some internet research on my own and I was surprised to find that the 7.62x39 drops something like 20-24 inches at 300 yards out of a 16" barrel. I always thought about it as comperable to 5.56 but it really isn't at least as far as trajectory. Makes the case for the shortened barrel format even more appealing honestly because now I know there's almost no point to putting anything like an LPVO; might as well toss a red dot on it and keep it inside of 200 or most likely 100.
Now I just need to find one in stock somewhere.