Has anyone used the Glock factory +2 (+1) extension on the G27? Did you change the mag spring? Any functional issues at all? I am asking about the factory part only because it Glock puts their name on it, then it "should" work. But that is what I want to find out. (Note: It also may be illegal to possess in my State, since it can also be used to make the G26 10 round mag into an illegal ASSAULT WEAPON. This State sucks).