No offense, but PMAGs will outperform USGI mags in every conceivable test. There's a very good reason that they're used by the top shooters in the world, and its because they work every time, whereas USGI mags don't. I've had to replace 4 of my issued mags because they get too dented to work properly, but in 5 years I've never had an issue with a PMAG. While there are some bad ones out there (like the OP had), don't let that discourage you from giving them a shot. Just buy quality.