I have Magguts in all my small pistols. I have never had a problem with any and I keep them loaded full. They just came out with a +2 for the 15 rd mag recently.Just added a magguts kit to one of the 12rd std mags for the x and I really like it. The extra pinky wrap is really helpful with my hands and the added baseplate thickness is insignificant. So it's a 14+1 now.
I need to run it a bit to be sure it's not going to hiccup, but I doubt it will. It really works well with the slight flare in the base of the grip on the WC grip module. Looks like they were made for each other.. lol