| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Daniel Dae Kim | David Jung | AKM | "Pohang" (E4) |
| Daniel Dae Kim | David Jung | Colt M4A1 | "Daegu" (E2), "Pohang" (E4) |
| Daniel Dae Kim | David Jung | Glock 17 | "Pilot" (E1), "Daegu" (E2), "Busan" (E3), "Pohang" (E4), "Annyeong" (E6) |
| Daniel Dae Kim | David Jung | Walther PPQ | "Annyeong" (E6) |
| Kim Tae-hee | Eunju Kim | Smith & Wesson M&P Compact | "Busan" (S1E03) |
| Piper Perabo | Juno Lund | Makarov PM | "Annyeong" (S1E06) |
| Reina Hardesty | Rebecca Jung | Walther P99 | - |
| Reina Hardesty | Rebecca Jung | Makarov PM | "Pilot" (S1E01) |
| Reina Hardesty | Rebecca Jung | Glock 17 | "Annyeong" (S1E06) |