I bought an AO carbine back in November and I had feeding issues with it at first too. As the rifle loosend up after a couple hundred rounds the ftf's became less common, but I still had an unacceptable amount jams until I bought some aftermarket magazines. I found some 30 round magazines at a gunshow for $25, I have know idea who makes them but I haven't had any ftf's with them yet. I wish I knew who makes them so I can get more. I also bought some of the Korean 15rd magazines which I've heard are pretty good, but I havn't tried them yet since the 30's work so good and I like that the bolt stays open after the last shot with the 30 rounders.