Some of y'all might remember the issue I had with my M&P 2.0 Compact getting too cold and mags not free falling. Some folks were convinced I was misreading the situation but others put their weapons in the freezer and found out that YUP, when it gets too cold, mags won't free fall.
Well, it has gotten a little worse. During my last range trip, I switched back straps. I normally use the Med Large, I switched to the Large just to try it out. While the Large was on it, mags would stop at 1/3 out the same way they do when the gun is exposed to cold temps for long periods of time. Didn't matter because I didn't really like the Large backstrap, anyway. However, once I switched back to the Med Large, mags started "dragging" a little. They would free fall BUT, when they get to that 1/3 of the way out spot, they slow down for a little ways then go back to free falling. Not trying to be disgusting but - it would basically poop out mag, if that makes any sense.
It's starting to look like I have it worked out. I dropped it, and reinserted it, over an over an over for a period of days and now it seems to be free falling the way I would expect it to. It is still a little unnerving and I am not certain that the issue will stay at bay.
If you have a 2.0 Compact, pay attention to how your mags drop under varying condition and see if you can spot anything (other than being too cold) that causes your mags to fall funny.