I tried a quick search but couldn't find any info along these lines:
Question - can one overheat a semiauto pistol such as an M&P?
Today I took the M&P 9c and put about 400 rounds through it. The range available to me at the moment is not very sophisticated and so I'm just trying to do round after round into a small target area.
After I started firing fairly quickly (about 0.5-1s between rounds, 17 rounds + mag change + 17 rounds), the gun started to FTF. A slap on the back of the slide would get it back into battery. I thought it might be ammo, because I switched ammo during the outing, but that didn't seem to make a significant difference. I used 4 different brands over the course of the outing. The gun got quite hot, to where I couldn't touch the front half of the slide for more than a second or so.
Someone else showed up at the range and I talked with him for a bit, and went back to shooting. No FTFs. The gun had cooled down.
Could the heat have been the issue? How much is too much for a gun like that?