I have had nothing but good luck with my Tapco mags. This is a steal at $4 per mag. Free shipping over $99 with code LY4.
http://www.brownells.com/magazines/...=Avantlink&utm_content=NA&utm_campaign=Itwine
http://www.brownells.com/magazines/...=Avantlink&utm_content=NA&utm_campaign=Itwine