The following weapons were used in the film 25th Hour:
Solothurn ITM AT84S
Uncle Nikolai (Levan Uchaneishvili) is seen handing over a Solothurn ITM AT84S to Monty Brogan (Edward Norton), who puts it to the head of Kostya Novotny (Tony Siragusa).
Solothurn ITM AT84S - 9x19mm
Note that the pistol here appears to have jammed (but it was not shown being fired).