So you are saying that the accuracy failings of the AK are because of the 7.62x39 round and not because of the design of the weapon?
^^^This. I have found that the 7.62x39 is a very accurate round. The standard AK platform is what gives that round a bad rap. The 2 main problems are the distance between front and rear site and barrel length.
Put a cheap optic on a standard, crude SKS and you will see surprisingly tight groups at 100 yrds.