| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Harvey Keitel | NYPD Det. Gene Hunt | Colt Detective Special | - |
| Harvey Keitel | NYPD Det. Gene Hunt | Walther PPK | - |
| Jason O'Mara | NYPD Det. Sam Tyler | Charter Arms Pink Lady | round hammer |
| Jason O'Mara | NYPD Det. Sam Tyler | Glock 19 | - |
| Jason O'Mara | NYPD Det. Sam Tyler | Ruger Mini-14 | anachronistic |
| Jason O'Mara | NYPD Det. Sam Tyler | AKM | continuity error |
| Michael Imperioli | NYPD Det. Ray Carling | Smith & Wesson Model 36 | - |
| Philip Glenister | DCI Gene Hunt | Webley Mk VI | - |