Erin go Braugh
This is a good anwer. The 20 round fixed without the star on the side work the best.Look for a fixed 20 round Chinese mag. They work flawlessly. Load from two strippers and have 20 rounds at your disposal with out a crazy long mag hanging out the bottom like with the duckbill mags.
I looked at a ton of different mags and even the sks d/m configuration and I still like the 20 round fixed best.
I've used them on an AK. They get old really quick. They weigh too damn much, but the worst thing is they make a hell of a racket. The bullets click around in the drum something awful. Probably good for a static defense. Other than that they just look cool.
they are detachable-blue steel and supposedly heavy duty-30 rd and 40 bucks. don't mind the price so much if they work and last awhile but i see a lot of bad press about sks mags. hope somebody out there makes a good one, they sure look badass withthose long mags.