| Actor | Character | Firearm | Notes |
|---|---|---|---|
| David Cubitt | Mark Shaw | Cobray M11/9 | "Cordo Maltese" (S3E03) |
| John Barrowman | Malcolm Merlyn | Taurus PT92AFS | "Uprising" |
| John Barrowman | Malcolm Merlyn | Smith & Wesson Model 36 | "Uprising" |
| Karl Yune | Maseo Yamashiro | M1911A1 | "The Calm" (S03E01) |
| Katie Cassidy | Laurel Lance | Glock 17 | "Sara" (S3E02) |
| Paul Blackthorne | Quentin Lance | SIG-Sauer P226 | main sidearm throughout the season. |
| Stephen Amell | Oliver Queen | Glock 17 | "Costo Maltese" |
| Stephen Amell | Oliver Queen | Nemesis Arms Vanquish | "Sara" |
| Willa Holland | Thea Queen | Colt M1911A1 | "The Return" (S03E14) |