your speculating a lot on something insignificant to a platform that puts up with a LOT.
in other words...
your overthinking it man.
Please forgive me for my ignorance, I remember this video from a few years ago about AK platform flexing
Being a combat veteran and using the AR platform, I personally own (2) AK's and a Saiga 12 and would rather have the AK
Didn't mean to pee on your cornflakes!