Crimson Rivers 2: Angels of the Apocalypse (2004)

Revealing mistake: At the end of the movie, where Commisar Niemans and his partner are in a firefight with a group of "angels", one of the bad guys is firing a Minimi machine-gun. When the camera zooms in, you can see that the weapon is fed with blank rounds.

Reda: You still never told me.
Commissaire Niemans: What?
Reda: The name of your dog.
Commissaire Niemans: I found an interesting name, a dangerous dog's name.
Reda: For a Yorkshire?
Commissaire Niemans: Yes, I called him... Reda.