I have a Valmet recoil buffer in my AK and it helps a lot. Its not near as jarring and a much smoother recoil than before. I was skeptical of it at first but it did help, even though i got it to protect the reciever mostly. You can also get one from Wilson Combat for the same $20 price.
I'm already surrounded by half-dead brainless people already, the zombie apocalypse would just give me a reason to be productive and get rid of them.