The AK has two primary recievers, milled ( very desirable and expensive ) and stamped ( probably what you get ).
Russian recievers are make better in two different ways, they are made with better metal and they are held to better tolerances.
The real problems comes with extended use. The Russian units flat out perform better than the Chinese units.
If I may, why are you looking to get an AR47 when there are better rifles out there?
Just a little information that might help.
