| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Kim Hae-sook | Yong Sook | CZ Redhead O/U shotguns | Episode 12 |
| Kim Hae-sook | Yong Sook | Sam Yang Air Rifle | - |
| Kim Hye-jun | K / Song Yi-kyung | Glock 17 | - |
| Bae Hae-sun | Jung Jeong-yeon | Beretta Px4 Storm | Ep.7 |
| Cho Hyun-chul | Oh Gyeong-su | FN FNS-9 | Toy replica; Ep.3 |
| Jung Suk-yong | Manager Kim | Sipja YSR 707 | Ep.9 |
| Jung Suk-yong | Manager Kim | Glock 17 | Ep.10 |
| Kim Soo-ro | Ko Dam | Beretta Px4 Storm | Ep.7 |
| Lee Hong-nae | Geon-wook | Glock 17 | Ep.12 |
| Kim Ki-chun | Caretaker | Tranquilizer Gun | for reference asWalther LP-53 Air Pistol; Ep.10 |
| Lee Hong-nae | Geon-wook | Phantom | Ep.12 |