(1) G3c 12RD mag (also fits the G2c but has scallop cut on base plate) and (1) UM Tactical Qualifier Mag-Pouch for the price of just a G3c magazine.
UM Tactical has created a universal, low mass, IWB/OWB mag pouch. The pouch uses their exclusive adjustable retention system. This system allows the accommodation of not only 9mm/.40 double stack, but most 9mm/.40/.45 single stack as well. Just use the sliding adjustment plate to achieve your preferred retention. Sliding the plate up will increase the retention and down will decrease the retention. If you mag seems to need a little more, simply move both the clip and adjustment plate under the mounting tabs.