I have never had any troubles with them. I know about yours though. As with anything that is stamped out in mass production I am sure some bad ones slip through. I am glad the 8 or 10 that I have have had no issues. I don't need to buy any more, these should last me my life time. MAG MAGCurly, I have actually has ASC mags that won't feed rounds consistently because of a physical obstruction issue. The fix is to grind down the front of the mag or to bend open the feed lips. I have done both and both will resolve the issue.