few years ago, entirely my own fault, a loaded a .40s&w shell without powder but live primer. bullet stuck in barrel. then i proceded to fire a correct 40s &w shell hitting the squib load.
cracked barrel, blew off front part of slide, and that was about it.
a poster on here sold me a new top slide and i got a new barrel. no more issues, runs fine.
that was in a glock 23 third generation.
