| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Colin Ferguson | William | SIG Pro SP 2009 | "Fallout" (S4E01) |
| Colin Ferguson | William | SIG-Sauer P226 | "Survivors" (S4E02) |
| Colin Ferguson | William | Walther P99 | "The Trouble with Troubles" (S4E10) |
| Emily Rose | "Lexie" | SIG Pro SP 2009 | - |
| Emily Rose | "Lexie" | SIG Pro SP 2022 | Continuity error |
| Eric Balfour | Duke Crocker | Glock 17 | "The New Girl" (S4E05) |
| John Dunsworth | David Teagues | Smith & Wesson Model 10 | (S04E04) |
| John Dunsworth | David Teagues | Smith & Wesson 5946 | (S04E13) |
| Lucas Bryant | Nathan Wournos | Remington 870 | "William" (S4E09) |