All guns break. Buy lots of guns.
Gun shop commandos who incessantly discuss how their fav pistol never breaks never shoot them or they shoot them for 50 rounds every other month.
I think it is hilarious how guns only break at shooting schools. I have seen Glocks break at TR (recoil spring, trigger spring, sear), Chapman Academy (slide stop spring on a G30) and LFI courses (name it).
Is Glock a good, tough pistol? Yes. Does it have weak points? Yes as do all. Is it magic? No, it will break.
If you buy a G30 to carry, get four of them (one to carry, one in reserve, one for the gunsmith, one hidden off your property).