I have carried this G23 for a long while now and I am just realizing that mine must be defective.
All of the Glocks I see on TV and in the Movies make a "clickity-click" noise when the bad guy or hero points them at someone. Mine does not make any noise at all when I point mine down range.
Maybe they only make that noise (which sounds amazingly similar to a revolver having its hammer pulled back to full cock) when you point it at a person.
I hope mine isn't broken......