hop up and bucking for m4 / ak47

[j.kinglsey]

I want to know who in your opinion make the best hop up and bucking for m4 and for ak 47. so far i have come to the conclusion that for m4 it would be the tokyo marui bucking with a systema hop up if anyone has any other suggestions please could you tell me. To be honest im really new to ak47 so not too sure who make the best so could someone recommend me some that would be a great help thanks.