I tried to get mine to fail this past weekend. I had my nephew with me. I had 4 mags and lots of cheap practice ammo. I started loading mags and handing them to him. I told him we are gonna get this gun hot and shoot lots of rounds. That is what we did. He was firing and I just kept handing him loaded mags. We must have shot 400 rounds through the M&P 9c in a short time, it was damn near non-stop. The gun really got hot. Not one stovepipe or malfunction. the only thing we noticed, after about 100 rounds, the magazine started to feel loose as you fed it into the weapon. But it always worked...it just felt loose. This puts me close to 1000 rounds in the gun. Not one problem so far. I'm sure S&W still has some bugs to work out, but this is a great little platform.