Absolutely love this product. holds my KWA MP7 mags in very well. Super fast mag changes and very easy insertion. I don't run a dump pouch so having fast mag (re-insertion?) is key. I even tried mounting them upside down, while it does work I still double check that they are in snug every so often as the mags are quite heavy and if you do a lot of fast-paced running and jumping gravity could get the better of them.