I'd be curious to know as well, but highly doubt it. 22 is generally super finicky and feeds better from single stacks. Glock doesn't changes this up very often, wonder what the aftermarket might provide.
I'm inclined to agree with this. I've been told the large rim to brass size causes feeding issues unless you get pretty technical with the magazine shape. The large rim causes the rounds to become cockeyed as they stack. KelTec is the only manufacturer that comes to mind that
sorta figured it out for pistols. Aside from that, your high cap mags are usually for rifles and they are still just long ass single stacks. I'm just going off my 10/22 and 15-22.
Still, I think this is a great trainer for anyone who carries a G19. Might pick one up for my wife so she can train and doing mag changes is not a bad thing for her.