While I respect your desires to have easy to acquire magazines, there are alternatives. Midway USA shows 3 different mags for the AR in 7.62x39mm.
i dont respect his desire, i just dont have the power to change it.... so i'll have to deal with it
hacking your lower to accept rocker mags from an ak is a HORRIBLE idea
please, just get the 7.62 mags for the ar