I am pretty new to this site, and to SKS rifles. Yesterday, I came across a Norinco SKS with separate magazines. One appeared to be maybe 5-rounds, and the other 30-rounds. They looked like AK-47 mags to me, and were marked Made In China. This didn't look like some kind of conversion, but like it was a factory set-up. I always thought that the SKS only came with an attached 5-round magazine. Can anyone provide info on this gun? Thanks!