I don't know about how you measure reliability, but I've personally handled two Glock 19s with much more than 45,000 rounds through them. Both range guns, both fired much, cleaned little.
One gun that I know of from the local range finally had a cracked frame (gen 1 Glock 19) after an estimated 500,000 rounds. You read that right - they keep a log of gun rentals and estimated 100 rounds per rental. Sent back to Glock with a note on rounds fired and "what can we do to fix this?" Came back a new Glock 19, gen 4 and a note from Glock stating "let us know how this one holds up."
If I ever handled a revolver with that round count, I'm unaware of it.
In fact, I'm certain I never held a revolver with upwards of 5,000 rounds through it.
Of course, Jerry Miculek might have one or two.....I wonder how often he has to tune his revolvers up?
