Perfect for double stacking - High Speed Gear HSGI X2R Taco MOLLE Pouch

These will hold any mag and they will hold tight. When you get them don't worry about tightening the cord. Over time you'll have to make adjustments if you are really using them. Keep in mind when setting them up one your plate carrier you will have to loosen the cord some. However, once on and if you tighten them you will have one very hard time getting in your mags at first. Good news is if you go rolling on the ground or end up upside-down they aren't going anywhere. Even better all are easy to pull out once you are ready for them.