Politiecommissaris Tanzi is het zat dat criminelen hun straf ontlopen door het falende justitiële systeem in Italië. Hij wil dergelijke misdadigers zelf gaan straffen. Hoewel collega's en meerderen hem trachten te stoppen gaat Tanzi als een eenmansleger keihard deze criminelen te lijf.
Nee, helaas is Roma a mano armata nog niet beschikbaar op Netflix in Nederland.
| Directing | Umberto Lenzi | Director |
| Writing | Dardano Sacchetti | Writer |
| Sound | Franco Micalizzi | Original Music Composer |
| Lighting | Roberto Belli | Electrician |
| Art | Giorgio Bertolini | Production Design |
| Crew | Gino Vagniluca | Special Effects |
| Camera | Mario Pastorini | Assistant Camera |
| Crew | Terry Levene | Presenter |
| Writing | Dardano Sacchetti | Screenplay |
| Editing | Maurizio Alabiso | Assistant Editor |
| Costume & Make-Up | Franco Carretti | Costume Design |
| Art | Francesco Bidoccu | Assistant Production Design |
| Crew | Gino Vagniluca | Armorer |
| Costume & Make-Up | Anna Rasetti | Seamstress |
| Production | Lamberto Palmieri | Production Supervisor |
| Camera | Mario Sbrenna | Camera Operator |
| Costume & Make-Up | Vanda Pruni | Costume Design |
| Costume & Make-Up | Massimo Giustini | Makeup Artist |
| Production | Luciano Catenacci | Production Supervisor |
| Directing | Goffredo Unger | Assistant Director |
| Costume & Make-Up | Davide Cenci | Costume Design |
| Production | Marcello Tagliaferri | Unit Manager |
| Camera | Giuseppe Gabrielli | Key Grip |
| Camera | Federico Zanni | Director of Photography |
| Production | Mino Loy | Producer |
| Writing | Umberto Lenzi | Story |
| Editing | Daniele Alabiso | Editor |
| Costume & Make-Up | Teodora Bruno | Hairstylist |
| Costume & Make-Up | Marcello Longhi | Hairstylist |
| Directing | Mirella Malatesta | Script Supervisor |
| Production | Luciano Martino | Producer |
| Camera | Mario Sabatelli | Still Photographer |
| Production | Sergio Borelli | Production Manager |
| Camera | Elio Polacchi | Camera Operator |
| Crew | Goffredo Unger | Stunts |
| Crew | Sergio Testori | Stunts |
| Crew | Anna Maria Zamperla | Stunt Double |
| Crew | Riccardo Petrazzi | Stunts |
| Crew | Valerio Colombaioni | Stunts |
| Crew | Giuseppe Monteverdi | Stunts |
| Crew | Benito Pacifico | Stunts |
| Crew | Renzo Pevarello | Stunts |
| Crew | Ottaviano Dell'Acqua | Stunts |
