notom66866, you're not going to get very far in life if you're unable to do your own research. You need to learn how to compare reviews yourself.
AK47 uses a version 3 mechbox, which is more durable than the v2 found in ARs. AK47 also has a more recent hopup design.
"The Bird of Hermes is My Name, Eating My Wings to Make Me Tame."