I have an aftermarket (Lage, I believe) magwell/grip, with the thumb release to drop the mag. It appears that the latch to lock the mag in is wider than the notch in the back of these, so they aren’t allowing it to click in. I’m thinking a few minutes with a dremmel to widen that notch will have ‘em clicking. Wanted to share the issue in case anyone else ran into it, but is in no way an issue with Bartomark’s work, is just a minor figment issue that would have occurred with the GG mags that were used regardless of the modification.