One Chicago police officer is seen with a Colt Trooper in his holster during the Nazi Rally.
Walther PPK
When the Blues Brothers and their band go to Ray's Music Exchange, Ray (Ray Charles) draws a Walther PPK and fires at a kid who is about to steal a guitar.
M1 Flamethrower
Incorrectly referred to as the "M79 Flamethrower", Jake's Ex-fiance (Carrie Fisher) uses an M1 Flamethrower to try to kill Jake and Elwood when they are in a phonebooth.
Luger P08
The leader of the Illinois Nazi Party (Henry Gibson) uses a Luger P08 to shoot at the Blues Brothers during the car chase at the end.
Used by State Troopers, Sheriff's Deputies, Prison Guards and Police.
M16A1
Used by State Troopers, Sheriff's Deputies, Chicago Police SWAT and U.S. Army soldiers.
Trivia
Weapons Guides
When she is at her beauty salon, Jake's Ex-fiance (Carrie Fisher) has two weapon manuals on her desk: "M79 Flame-Thrower" and "Anti-Personnel Mines". It's difficult to see the other text on the manuals, but from the logos, it looks like Government files. I wonder how she got those...