| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Anthony Wong Chau-Sang | Inspector Wong | Smith & Wesson Model 36 | - |
| Edison Chen | young Lau Kin-Ming | Smith & Wesson Model 10 | Recycled montage fromInfernal Affairs |
| Edison Chen | young Lau Kin-Ming | Lee-Enfield No. 1 Mk III* | Possible drill rifle, Recycled montage fromInfernal Affairs |