30. Ruger Single Six/Blackhawk/Vaquero
> Estimated units sold: 4,000,000
> Firearm class: Revolver
> Country of origin: United States

Source: Public Domain / Wikimedia Commons
29. ‘Brown Bess’ Land Pattern Musket
> Estimated units sold: 4,300,000
> Firearm class: Musket
> Country of origin: United Kingdom

Source: Public Domain / Wikimedia Commons
28. Carcano Modello 1891
> Estimated units sold: 4,500,000
> Firearm class: Bolt-action rifle
> Country of origin: Italy

Source: Public Domain / Wikimedia Commons
27. STEN gun
> Estimated units sold: 4,500,000
> Firearm class: Submachine gun
> Country of origin: United Kingdom

Source: caiheng / Flickr
26. M1911 (and copies)
> Estimated units sold: 5,000,000
> Firearm class: Semi-automatic pistol
> Country of origin: United States
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