Took my brand new Gen4 G19 to the range today for the first time. Used the same Federal 9mm 115 grain ammo I have used in my Bersa, and in my XD9SC. Could NOT get 3 consequtive rounds fired successfully. Stovepipes, rounds not getting fed into the chamber correctly. I have noticed that the new spring does not stay down in the notch of the barrel, but rather begins to creep up. Also notice that the slide gets stuck a bit about 3/4 of the way down when putting it back on the frame. Almost looks misaligned on the frame until you get it all the way on. Very disappointed, after so much success w/my Gen 3 G23. Cannot believe I have to call Glock and probably have to send it to them, after attempting to put 100 flippin rounds through a brand new gun. Very aggravating. I am thinking my choice of a Gen4 over a Gen3 was a bit hasty. What a bummer!