Three Days of the Condor is a 1975 post-Watergate, post-Vietnam paranoid political/espionage thriller based on the best-selling novel Six Days of the Condor and was directed by Sydney Pollack(The Yakuza, Out of Africa, The Firm). The film (now considered to be a classic of the genre) stars Robert Redford as a CIA analyst who must go on the run after finding his entire section assassinated because of a piece of sensitive information that was uncovered by him.
The following weapons were used in the film Three Days of the Condor:
Joe Turner (Robert Redford), codenamed "Condor", takes a Colt M1911 from the desk secretary after she has been killed by Joubert and "the mailman". He identifies it on the phone as a ".45 automatic."
Ingram MAC-10
"The Mailman", a hitman named William Lloyd (Hank Garrett), uses a suppressed MAC-10 during the opening hit on the CIA facility and later when attempting to kill Condor in the apartment. Condor (Robert Redford) briefly gets his hands on it twice but the mailman kicks it away each time.
Winchester Model 1897
Sgt. Jennings (Hansford Rowe), the security guard at the American Literature Historical Society CIA deep cover in New York, reaches for a Winchester Model 1897 when he was shot.
Star Model B
When Turner's CIA station chief S.W. Wicks (Michael Kane) requests a ".45" from the CIA armorer, the pistol given to him actually appears to be a 9mm Star Model B. Later, Wick is seen attaching a suppressor onto the pistol and is seen using it during the alley shootout with Condor. In what appears to be a continuity error, Condor's 1911 briefly changes to this pistol during his fight with the mailman. It's possible that this was done because the pistol was actually seen fired and 9mm blanks were more reliable during this time period.
Mauser C96
Joubert (Max von Sydow) aims a Mauser C96 with a holster, stock, and scope at Condor outside Sam and Mae Barber's apartment building but is unable to fire it.
Astra Constable
Joubert (Max von Sydow) holds an Astra Constable when confronting Condor and Leonard Atwood (Addison Powell) in his home.