My M&P .40 full size went back to S&W because the mags full or empty would not drop out of the frame.

Received @ SW: Feb 23, 2018
I PU @ Trader Jerry's 6/7/2018

They put a new frame on it which changes the S/N -- reason it could not be sent to my home.

I'm glad they fixed it at no charge but sure took their time. Lead time and inquiry was 4-6 weeks then 2-4 weeks then 2 more weeks -- which was 3 weeks. I couldn't get a firm commitment from S&W about the status even when I initiated an inquiry.

Oh well...