I had intended to NOT see Munich, but my wife wanted to, so...
Anyway, it just so happens that I am in the exact middle of reading "Vengeance," the book upon which Munich is loosely based. One of the things that jumped out at me is that Avner and company were trained to use tiny little Berretta .22 semi-autos like this:
According to "Vengeance," this is the official assassination weapon of the Mossad (much like the CIA uses the Ruger MK series), and the only firearm the team used.
In the first assissination, Spielberg has them using the much larger 9mm Berretta 92FS:
To top it off, when Karl, the cleanup man, comes to remove any evidence immediately after the hit, he is shown picking up spent rimfire cartridges from the floor. Spielberg can't even make up his mind if they were using a 9mm or a .22!
I find this particularly ridiculous since Spielberg went to such great lengths to digitally remove firearms from the hands of agents and replace them with walkie-talkies upon the anniversary re-release of E.T.
He removed guns entirely from E.T., but was not content with little guns in "Munich" and inaccurately replaced them with big guns.
What a butthead.