3-pounder gun, 3-pounder, 3-pdr or QF 3-pdr is an abbreviation typically referring to a gun which fired a projectile weighing approximately 3 pounds. It may refer to :
- The Grasshopper cannon : of the 18th century
- QF 3-pounder Hotchkiss : Hotchkiss 47mm naval gun used by many countries from 1885
- QF 3 pounder Nordenfelt : Nordenfelt 47mm naval gun used by many countries from 1885
- Ordnance QF 3-pounder Vickers : British Vickers 47mm naval gun of World War I and World War II
- OQF 3-pounder gun : used to arm interwar Vickers Medium Tanks
| This article includes a list of related items that share the same name (or similar names).
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