The Godfather Part III is the third and final installment in the film saga of the Corleone crime family that began with 1972's The Godfather and continued with 1974's The Godfather Part II. The 1990 film follows Michael Corleone (Al Pacino) as he attempts to mend his criminal past by going into business with the Vatican.
The following weapons were used in the film The Godfather Part III:
Vincent Mancini (Andy Garcia) pulls a Beretta Cheetah when confronted by assassins sent by Joey Zasa (Although the pistol turns into a Walther PP for a close-up).
Walther PP
For the close-up in which Vincent shoots the thug through the head, an Walther PP replaces the Beretta Cheetah. Al Neri (Richard Bright) is also given a Walther PP hidden in a box of cookies while on the train to meet Archbishop Gilday.
An Astra 400 pistol can be seen in Mosca's cabinet of costumes and guns.
Beretta 92SB-C
One of the hoods sent by Joey Zasa to kill Vincent Mancini (Andy Garcia) carries a Beretta 92SB-C. One of the twins, Armand (Rogerio Miranda) and Francesco (Carlos Miranda), employed by Michael as bodyguards, also carries a Beretta 92SB-C.
Several 12 Gauge Double Barreled Shotguns with exposed hammers can be seen. Al Neri (Richard Bright) uses one to blast out of the Atlantic City meeting, one of Vincent's hitmen — who may also be Al Neri — uses one during the street parade shooting, Mosca (Mario Donatone) uses one when shooting at Don Tommasino's car, Lupo (Marino Masé) carries one during the operatic climax, and some of the actors during Anthony's opera in Sicily can be seen handling some.
Submachine Guns
IMI Uzi
The helicopter hitmen sent by Joey Zasa (Joe Mantegna) use Uzi submachine guns during the hit on Michael Corleone (Al Pacino) and other mob bosses at the Atlantic City meeting.
MAC-10
One of Vincent's hitmen during the street parade hit carries a MAC-10.