Re: You are probably correct...
"This is the correct theory
After 2 trips back with my full size .40 and two different "mag catch" replacements, I finally talked to a gunsmith at Smith upon the 3rd visit and he explained that there were a bad batch of frames that abosultely had too much tolerance, and needed to be replaced. After sending me a free magazine with each trip back for repairs, the last trip they sent me a new frame, and added night sights as well! The gun hasn't had one problem since and I have 4 mags gratis plus night sights."
Jagman: What is the serial number of your full-size .40? That would be very helpful.
"This is the correct theory

Jagman: What is the serial number of your full-size .40? That would be very helpful.