Hey Guys, I just bought a Century Arms Zastava Pap M70 7.62x39 AK-47 and the 2 mags that I got with the gun would not work. They will go into the mag well and lock into place but after I fire the 1st round it would jam. I tried it about 10 different times with both mags full, with 20 rounds, with 10 rounds, and with 2 rounds with the same end result. Finally after just about giving up on shooting it a man came over to my booth with his AK and asked if I needed any help. I told him what was going on and he offered to try the mags in his rifle, so he did and they worked flawlessly. Then I asked him if I could try his mag and he agreed, filled it up and tried it out with no jams. Then I filled it again and tried it with no jams. I asked if he would trade me both of my mags for his mag and he did. I shot 200 more rounds this afternoon with no jams. The mag he traded me has no markings on it to identify a manufacture so I was wondering if anyone would know why a mag would fit and lock but jam after the 1st round? I would like to get a few more spare mags but don't want to get ones that will not work.