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They were a major export item and hence were actually of 120 mm calibre (4.724 inches) to meet the requirements of metricised navies (although the size was ultimately based on a 12-pound round shot), 4.7 inch is an approximation used for the British designation. 4.7 inch guns include:
The 4.7-inch gun M1906 (initially the M1904) was designed and issued by the United States Army Ordnance Department beginning in 1906, with the first units receiving the weapon in 1911. [1] It was of the field gun type.
Single Mk IX gun on HMCS Assiniboine with gunners sheltering behind the shield. The 4.7 inch QF Mark IX and Mark XII were 45-calibre, 4.7-inch (120 mm) naval guns which armed the majority of Royal Navy and Commonwealth destroyers in World War II, [1] and were exported to many countries after World War II as the destroyers they were mounted on were sold off.
The QF 4.7-inch gun Mks I, II, III, and IV [note 4] were a family of British quick-firing 4.724-inch (120 mm) naval and coast defence guns of the late 1880s and 1890s that served with the navies of various countries.
The BL 4.7-inch, 45-calibre gun (actually a metric 120 mm gun) was a British medium-velocity naval gun introduced in 1918 for destroyers. It was designed to counter a new generation of heavily armed German destroyers that were believed to be in development.
4.7-inch gun M1920 on carriage M1920 [2] with 65-degree maximal elevation (the carriage was also designed to be used with 155-mm howitzer) weighing 13,000 pounds (5,900 kg). [5] 4.7-inch gun M1922E on carriage M1921E [2] of a similar design and same ballistics, but with 45-degree maximal elevation and lighter, just 10,600 pounds (4,800 kg).
The QF 4.7 inch Gun Mark VIII [1] was a British naval anti-aircraft gun designed in the 1920s for the Royal Navy. This was the largest caliber fixed ammunition gun ever in service in the RN, though the round was considerably shorter and lighter than the round for the QF 4.5-inch Mk I – V naval gun .
With a shell 24% heavier, the new gun was far more powerful than the previous 45 calibre long 4.7 inch gun making it a match for a weapon such as the Italian 120/50 mm, [5] whilst also improving its anti-aircraft capacity. It could now penetrate 3 in (76 mm) of armour at a range of 6.2 mi (10 km) rather than 3.7 mi (5.9 km).