I use the Esstac kywi pouches, and they never miss a beat.
Used the CQBR all day yesterday at The Gaol and the only issue I had with it was one double feed, my own fault, overloaded the magazine, and ended up spending 5 minutes clearing white shit out of my chamber.
7 mags is perfect, 3 up front, 2 on my right side, 1 on my belt and 1 in the gun. I get paranoid though, and wonder if I should get spares... you know, just in case...