I have 2 30rd mags linked together by a MagCinch by Buffer Technologies. The mags are aftermarket mags, no name. They feed and function fine. $30.00 shipped If interested e-mail me only, I'm not sure how to use the IM.
Price lowered to $25.00 shipped.
The Mag Cinch would cost you $20.00 alone, I'll even include 2 green followers with it.