305mm/45 Modèle 1906 gun

{{Infobox weapon

|name= 305mm/45 Modèle 1906 gun

|image=Courbet in Toulon-Agence Rol.jpeg

|image_size=300

|caption=Main guns of the Courbet

|origin= France

|type= Naval gun

|is_ranged=y

|is_bladed=

|is_explosive=

|is_artillery=y

|is_vehicle=

|service=

|used_by={{navy|France}}

|wars= World War I
World War II

|designer=

|design_date=

|manufacturer=

|production_date=

|number=

|variants=

|weight={{convert|54.65|t|LT|sp=us}}

|length=

|part_length={{convert|12.775|m|ftin|sp=us}}

|width=

|height=

|crew=

|cartridge= Separate charges

|cartridge_weight={{convert|440|kg|lb|sp=us}}

|caliber={{convert|305|mm|in|sp=us}}

|action=

|rate=1.5 rounds per minute

|velocity={{convert|780|m/s|ft/s|sp=us}}

|range=

|max_range={{convert|14500|m|yd|sp=us}} at +12°

|feed=

|sights=

|breech=1906: Manz interrupted screw
1910: Welin interrupted screw{{Cite web|url=http://www.navweaps.com/Weapons/WNFR_12-45_m1906.php|title=France 30 cm/45 (12") Model 1906 and Model 1906-1910 - NavWeaps|website=www.navweaps.com|access-date=2019-04-26}}

|recoil=

|carriage=

|elevation=

|traverse=

|diameter=

|filling=Picric acid

|filling_weight=

|detonation=

|yield=

}}

The 305mm/45 Modèle 1906 gun was a heavy naval gun of the French Navy.

The type was used on the {{sclass|Danton|battleship}}, mounted in two twin turrets. An improved version, the 305mm/45 Modèle 1910 gun, was installed on the Courbet class. Six surplus guns were modified to become railway guns and designated Canon de 305 modèle 1906/10 à glissement at the end of World War I, and, although too late to see action in that war, they were used during the Second World War.