| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Marsha Thomason | FBI Special Agent Diana Berrigan | Heckler & Koch MP5K | "Countdown" (S3E10) |
| Matthew Bomer | Neal Caffrey | M136 AT4 | "Countdown" (S3E10) |
| Matthew Bomer | Neal Caffrey | SIG-Sauer P229R | "Checkmate" (S3E11) |
| Ross McCall | Matthew Keller | SIG-Sauer P229R | "Checkmate" (S3E11) |