I have a Gen4 G19 that has been MALFUNCTION FREE for a couple thousand rounds. I have no idea where my cases go...I'm on the front sight. The ONLY thing that concerns ME (speaking only for myself) is that the thing RUNS!!! And it does with ANYTHING I put in it. I trust it to save my life, if needed. Have you had ANY actual stoppages? I hope Glock takes care of it for you.