Badtheba hopefully that fixes your problem. It took me a few field strips and cleaning to finally get a few magazines through without a malfunction.

I have a Kahr CW45 and Springfield XD that worked right out of the box. I have never had an issue with them. I was going back and forth between the XDS and Shield but went with the Shield because it just felt so balanced. Don't regret my decision since I had to send it in but just need S&W to issue a clean bill of health and for me to get through quite a few magazines without a malfunction.

Patton I am with you in that it has to be a manufacturing issue of some sort. I have the Performance Center so not sure how manufacturing would differ with the ported barrel if that turns out to be the problem. I was looking on my box for a date and see 082016 which could be August 2016. Could have been a manufacturing flaw during this time frame but just trying to think of a theory.