The Following Guns were used in the film Last Man on Earth ,the(1964)
PPSh-41
The PPSh-41 is used by the mutants and is also seen on the gun rack in the police department. It appears to have the vertical forgrip of a Thompson submachine gun.
PPSh-41 submachine gun.
M1903 Springfield
Used by mutants at the end of the film.
Springfield M1903 Transitional (pre-WW2) issue - .30-06