...Glock and other synthetic frame pistols do have a weakness that is very specific to synthetic frames. They are vulnerable to impact damage to the frames. Honestly this is a very small deal as it's rare a pistol is taken out of action from impact damage, but it does happen on battlefields...
I have a very close friend that is a part time instructor for Clint Smith at Thunder Ranch and also a Krav Maga instructor (DocRocket knows him). He has "torn" the slide off of numerous Glocks doing "improvised baton" training (it's his "why you never use a Glock as a club" demonstration).
Yep, just one of the "weaknesses" of a Glock. EVERY pistol has an Achellies heel; every last one. Best idea is to find one, find out what it is, then determine if it's an Achilles heel you can live with, or mitigate somehow.
Sig's...They have no backstrap on the frame, so break the grips and the pistol is all but useless (grips are pretty tough). How to mitigate? Hogue's are all but indestructible, but they also make the grip significantly fatter.
Beretta's - If you don't treat the locking block as a wear part and change every 5k rounds, it WILL break and completely lockup your pistol. Slide mounted safety takes a good deal of extra training to live with; better do it.
Look closely and you'll find a weak spot on EVERY pistol.
