Aftermarket 30 round mags are almost impossible to put in with ought shooting your self"
Wrong on both counts.
I have 2 of them and use 10,20, and 30 rnd mags as well as an 80-rnd drum. Many a reload over the past 20-plus-years without inadvertently committing suicide.
Never seen a soviet 80 rnd drum
75? sure
still the SKS was designed with a 10 rnd fixed mag and with the exception of the Chinese paratrooper model mag changes aint happening in an intuitive or expeditious manner