Season 4 Episode 5 - The Duel
A number of guns used in this episode. The ones I recognized:
1. Webley Mk IV and Mk VI .455 Revolvers
2.Colt Model 1911 .45acp Pistols
3. Thompson Model 1921 (?) .45acp SMG
4. Mauser Model 1896 Broom Handle Pistol
5. SMLE No 1 Mk III .303 Rifles
6.DBL Shotguns
7.Lewis Light MG

What I did not recognized:
1. Polly's small revolver
2. Small Automatic Pistols used by members of the New York Mafia
3.The SMG used by Tom after He discarded the Lewis MG (an early Sten ?)
4. Mr. Gold's lever action rifle

Opinions?
1.

Have not watch in a long time but was hooked on that show for a while. Good list and recognition.

The Internet Movie Firearms Database is generally a good source for looking up what firearms were featured in various forms of media.

Peaky Blinders - Internet Movie Firearms Database - Guns in Movies, TV and Video Games

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Shooting Comfort is bilateral.