David Marshall Williams is sent to a prison farm where he works in the tool shop and eventually develops the precursor of the famous M-1 Carbine automatic rifle used in World War II.
| Writing | Art Cohn | Screenplay |
| Writing | Art Cohn | Story |
| Directing | Richard Thorpe | Director |
| Production | Armand Deutsch | Producer |
| Sound | Conrad Salinger | Music |
| Crew | William C. Mellor | Cinematography |
| Editing | Newell P. Kimlin | Editor |
| Art | Cedric Gibbons | Art Direction |
| Art | Eddie Imazu | Art Direction |
| Art | Ralph S. Hurst | Set Decoration |
| Art | Edwin B. Willis | Set Decoration |
| Costume & Make-Up | Walter Plunkett | Costume Design |
| Costume & Make-Up | Sydney Guilaroff | Hairstylist |
| Costume & Make-Up | John Truwe | Makeup Artist |
| Costume & Make-Up | William Tuttle | Makeup Designer |
| Directing | Al Jennings | Assistant Director |
| Sound | Douglas Shearer | Recording Supervision |
| Crew | A. Arnold Gillespie | Special Effects |
| Crew | Warren Newcombe | Special Effects |
