| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Kim Byung-chul | Sigma | Beretta M9A1 | nickel-plated |
| Kim Byung-chul | Sigma | Glock 17 | - |
| Kim Jong-tae | Kang Dong-gi | Colt M4A1 | - |
| Kim Jong-tae | Kang Dong-gi | CAA RONI-G1 | - |
| Park Shin-hye | Kang Seo-hae | Beretta 92FS Inox | w/ riser, flashlight, custom grip, paint, stickers |
| Park Shin-hye | Kang Seo-hae | FN SCAR-L | w/ EOTech sight, suppressor, flashlight, laser, VLTOR handguard, custom paint and stickers |
| Park Shin-hye | Kang Seo-hae | Glock 17 | silenced; full auto-converted with extended magazine |
| Park Shin-hye | Kang Seo-hae | CAA RONI-G1 | w/Glock |
| Park Shin-hye | Kang Seo-hae | Korea Special-Purpose Weapon | w/Daewoo K5 |
| Park Shin-hye | Kang Seo-hae | Colt M4A1 | customized |
| Park Shin-hye | Kang Seo-hae | Knight's Armament SR-25 | w/ suppressor and bipod |
| Park Shin-hye | Kang Seo-hae | Custom zipline launcher | made from multiple firearms' parts |
| Sung Dong-il | Park Hyeong-do | Colt Python | airsoft revolver |