| Actor | Character | Firearm | Notes |
|---|---|---|---|
| Barry Keoghan | Cormac McDevitt | Lee-Enfield No.1 Mk.III* | Ep. 01/02/03/04 |
| Barry Keoghan | Cormac McDevitt | Luger P08 | Ep. 02 |
| Brian Gleeson | Jimmy Mahon | Snider-Enfield Rifle | "Young Guns" (S01 E01) |
| Brian Gleeson | Jimmy Mahon | Martini-Henry Carbine | "Young Guns" (S01 E01) |
| Brian Gleeson | Jimmy Mahon | Mauser Gewehr 1871 | "Young Guns" (S01 E01) |
| Brian Gleeson | Jimmy Mahon | Mauser Gewehr 1898 | "Young Guns" (S01 E01), "To Arms" (S01 E02), "Under Siege" (S01 E03) |
| Brian Gleeson | Jimmy Mahon | Lee-Enfield No.1 Mk.III | "Under Siege" (S01 E03) |
| Brian McCardie | James Connolly | Webley Mk VI | Ep 02/03 |
| Eemeli Louhimies | Milo | Jam Tin Grenade | Ep. 01 |
| Eemeli Louhimies | Milo | Lee-Enfield No.1 Mk.III* | Ep. 02 |
| Ian McElhinney | Edward Butler | Double Barreled Shotgun | "Under Siege" (S01 E03) |