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| Canon de 100mm | |
|---|---|
 100 mm turret on Lieutenant de vaisseau Lavallée | |
| Type | Naval gun |
| Place of origin | France |
| Service history | |
| In service | 1958–present |
| Used by | France, Belgium, Portugal, Turkey, Argentina, Brazil, Saudi Arabia, Bulgaria, Malaysia |
| Wars | Gulf War, Falklands War |
| Production history | |
| Designer | Tonnelé |
| Designed | 1953–1961 |
| Manufacturer | Naval Group formerly DCNS |
| Produced | 1961–present |
| Variants | modèle 53 modèle 64 modèle 68 modèle 100 TR Compact |
| Specifications | |
| Mass | 22 tonnes (49,000 lb) (Compact version: 19 tonnes (42,000 lb)) |
| Barrel length | 55 calibres 5,500 mm (220 in) |
| Crew | 2 (modèle 68); later version entirely automatic |
| Shell | 100x700mmR
cartridge weight 23.6 kilograms (52 lb) |
| Shell weight | 13.5 kilograms (30 lb) |
| Calibre | 100 mm (3.9 in) |
| Elevation | 29°/s |
| Traverse | 40°/s |
| Rate of fire | 60, 78 or 90 round/min depending on version |
| Muzzle velocity | 870 m/s (2,900 ft/s) |
| Effective firing range | 17,000 m (elevation 40°) |
| Maximum firing range | Maximum practical range:
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Modern French 100 mm naval guns are multipurpose artillery pieces, capable of a high rate of fire, against both aerial and surface targets. Most modern French warships are or were equipped with one of its variants.