When Spats' henchmen (Mike Mazurki and Harry Wilson) are being chased by the police in the opening scene, they each grab a Winchester Model 1897 from the ceiling of the hearse and fire back, disabling the police car. Some of his henchmen, including "Tiny" (Pat Comiskey), also fire Winchester '97s during the film's version of the St. Valentine's Day Massacre.
The Chicago policemen chasing Spats' henchmen all fire Smith & Wesson Model 10 revolvers at them. A Model 10 is also seen as one of the confiscated weapons during the "Friends of Italian Opera" mob convention in Miami.
Spats Colombo (George Raft) and his henchmen (Harry Wilson and Mike Mazurki) fire Thompson M1921AC submachine guns at Toothpick Charlie's mob during the film's version of the St. Valentine's Day Massacre. The same henchman later has a Thompson confiscated in Miami when he tries to conceal it in a golf bag. The mob hitman in Miami fires a Thompson at Spats' mob, killing all five of them when he jumps out of a birthday cake firing.
The "Sergeant-at-arms" finds a pistol appearing to be a Browning Hi-Power (anachronistic for the film's 1929 setting) in a henchman's (Mike Mazurki) pant leg. When the henchman growls "It ain't loaded", the man unrolls the henchman's other pant leg, revealing a large quantity of ammunition.
