For me, the $10 Glock mag pouch works better than all the other pouches in the shoebox, and it can be tweaked to fit some M&P mags.
[video=youtube_share;e9yDIw5OXs8]http://youtu.be/e9yDIw5OXs8[/video]
[video=youtube_share;e9yDIw5OXs8]http://youtu.be/e9yDIw5OXs8[/video]