I took apart the mag, and once I had the last screw undone the spring popped open with the remaining bbs. I tried putting it back together and in the process I lost the small spring that holds the tab that keeps the bbs in.
After a lot of swearing, I broke apart a pen and used it as a replacement. Who knew it would fit perfectly.
There was a small circular piece or rubber that was at the enterance of the bb opening. I think that piece was causing the jam in the first place to tell you the truth. I remember it being twisted around the problem bb in the first place. I didn't know what the purpose of the piece was then, and I don't know what it does now... I hope I won't miss it.
Thanks for your help! It seems to be working for the moment.
Here is an image that a guy at Arnies gave to me. It's in Japanese, but you get the idea of how the mag works after looking at the pic.