
Source: Public Domain / Wikimedia Commons
5. Lee-Enfield
> Estimated units sold: 17,000,000
> Firearm class: Bolt-action rifle
> Country of origin: United Kingdom

Source: blackwaterimages / E+ via Getty Images
4. M16/M4/AR-15 and derivatives
> Estimated units sold: 20,000,000
> Firearm class: Assault rifle/semi-automatic rifle
> Country of origin: United States
3. Mosin-Nagant
> Estimated units sold: 37,000,000
> Firearm class: Bolt-action rifle
> Country of origin: Russia

Source: philipimage / iStock via Getty Images
2. Mauser Gewehr 98 (and similar)
> Estimated units sold: 102,000,000
> Firearm class: Bolt-action rifle
> Country of origin: Germany

Source: serikbaib / iStock via Getty Images
1. Kalashnikov AK-47 (and derivatives)
> Estimated units sold: 150,000,000
> Firearm class: Assault rifle
> Country of origin: Soviet Union
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