A friend of mine bought 2 M&P9 mags from Rural king here in North Central Indiana. Well I went and picked up 2 more Saturday. They are Promags. They where $26.95 with 30 percent off which made them $40.42 OTD for 2 of them. I have a total of 6 mags now. If you have a Rural King there may be some M&P 9 mags there. I did got out and use all the mags this weekend and could not tell the difference the Promag and the original as far as function. First Time having a M&P9 and I can honestly say good bye Glock. I can see my scores going up as I Type in IDPA and USPSA. Jim

As long as the floorplates on those cheap aftermarket mags don't give up and blow your rounds out the bottom of the magazine you should be fine...