Short Magazine Lee-Enfield (SMLE)/Lee-Enfield Mk.I
British and Irish forces throughout the film use SMLE Mk.III rifles, and IRA soldiers can be seen carrying Lee-Enfield Mk.I rifles during the Easter Rising scene and the Civil War fighting in Dublin.
Mauser C96
Used with and without the optional shoulder stock by Liam Neeson as Michael Collins in the Easter Rising scenes in the beginning, as well as an unidentified IRA assassin who shoots a police inspector in his car.
Ross Mk.III
An IRA soldier can be seen surrendering a Ross Mk.III rifle in the Easter Rising scene.
Sharps Carbine
An empty Sharps carbine is shown to Michael Collins and carried by an unknown IRA member during the raid on the police station in the beginning.
Unknown Double-Barrelled Shotgun
Seen throughout the movie in the hands of various known IRA soldiers.
Colt New Service
Used by Liam Neeson as Michael Collins to threaten Ned Broy (Stephen Rea) outside a bar, and later by Brendan Gleeson as Liam Tobin during the jailbreak scene.
Webley Mk IV & Mk VI Revolver
British officers, RIC Detectives and many IRA members carry Webley Mk.VIs throughout the film. Julia Roberts as Kitty Kiernan pulls a Mk.IV on a potential assassin during the political rally scene.
Winchester Model 1897 Trench Shotgun
Carried by a Black and Tan arresting Ned Broy, although these were never used by any British units.
Lewis Gun
Carried by Black And Tans, most noticeably when it is fired at Dublin tenements. Also mounted on an Irish Army troop truck, where it is used by Ian Hart as Joe O'Reilly
Hotchkiss Mk.I
Turret mounted on British and Irish armored cars, most notably in the Bloody Sunday scene.
Steyr 1912
Aidan Quinn as Harry Boland uses a Steyr 1912 during the Civil War scenes in Dublin, and an unidentified IRA assassin in the Bloody Sunday scene.
Colt 1911
A Colt 1911 is used by Brendan Gleeson as Liam Tobin in the Bloody Sunday scene, and Aidan Quinn as Harry Boland takes one from an overzealous bodyguard during his confrontation with Collins.
Luger P08
Carried by an unknown IRA assassin who shoots a British secret service agent in his hotel room.
Browning 1900
Used by Tom Murphy as Vinnie Byrne to shoot a British detective through a newspaper, and by Ian Hart as Joe O'Reilly throughout the film.
Bergmann MP18
Used by IRA members to assassinate three British secret service agents in a cafe.
Thompson
IRA members are seen using M1921 Thompson submachine guns following Bloody Sunday and during the civil war fighting in Dublin. This is historically accurate, as the IRA bought some of the first Thompson guns off the production line.
Browning Automatic Rifle M1918
Seen in the hands of an IRA member during the Civil War fighting in Dublin.