| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Liam Neeson | Michael Collins | Mauser C96 | - |
| Liam Neeson | Michael Collins | Colt New Service | - |
| Aidan Quinn | Harry Boland | Steyr 1912 | - |
| Aidan Quinn | Harry Boland | M1911 | - |
| Brendan Gleeson | Liam Tobin | Colt New Service | - |
| Brendan Gleeson | Liam Tobin | M1911 | - |
| Ian Hart | Joe O'Reilly | Lewis Gun | - |
| Ian Hart | Joe O'Reilly | FN Model 1900 | - |
| Jonathan Rhys Meyers | Collin's Assassin | Mauser Gewehr 1898 | - |
| Julia Roberts | Kitty Kiernan | Webley Mk IV | - |
| Sean McGinley | Irish "G-Man" | Webley Mk VI | - |
| Brendan Gleeson | Liam Tobin | M1911-style pistols | - |