| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Charles Bronson | George "Machine Gun" Kelly | Colt Detective Special | 1st Gen model with Round Butt grips |
| Charles Bronson | George "Machine Gun" Kelly | M1928 Thompson | With 30-round magazine |
| Frank DeKova | Harry | Colt Official Police | - |
| Jack Lambert | Howard | Colt Detective Special | - |
| Jack Lambert | Howard | Unidentified revolver | - |
| Susan Cabot | Florence "Flo" Becker | Colt Official Police | - |
| Susan Cabot | Florence "Flo" Becker | M1928 Thompson | - |