I've got 2 P2K SKs. One in 9mm and one in .40. The 9 was pretty tight when I got it, but has loosened up a bit with about 1500 rounds. The .40 didn't seem to be quite so strong out of the box, but it's still a stiff spring. It will break in, so don't give up.Well, let me put it this way. The size of the magazine release wouldn't be a problem if the mag release's spring tension wasn't so heavy.