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Seems that mine isn't quite as pronounced as yours. Never noticed it before visually or when gripping, and that second part is most important.
View attachment 108144
OP, yours does look like a bigger gap. In addition, your floorplate isn't parallel to the bottom edges of the grip. Maybe you have a bad mag, or the floorplate isn't installed properly on it?
I just got the Pearce extension for my mp shield 9mm and it tightened the gap a little bit. It also makes the gun a lot more comfortable to hold. I recommend buying one.