Hi all. Was wondering if anyone has used Dawson Precision's Ice magwell for the Gen 4s. Has anyone had any problems with them? I was looking at the ICE magwell that allows one to use the medium backstrap. Any info would be much appreciated. Ohh, also can the stock mags be used or are mag extensions necissary? I was looking at the oem Glock plus 2. Thanks. Wanna kill these ads? We can help!