I use one of my 82's for carry, and if I can't get a mag to run consistently, it's junk to me. I've been lucky to only have bought the crossed swords mags. I had one that would not feed the last round sometimes, the lips were too wide. Even after I fixed it, it wasn't a carry mag. If you have to take a new mag and fix it to run, will you ever trust it? I won't. In the heat of the moment I want to know for sure that my rig is as good as possible. Listen to what people have to say about what works and what doesn't. Then when you step out, you've done all you can do. Enjoy