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A new type of 4.5 inch gun with a longer 55-calibre barrel, it was designed in the 1960s for the Royal Navy's new classes of frigates and destroyers.The weapon, built by Vickers Ltd Armament Division, was developed by the Royal Armament Research and Development Establishment using the Ordnance, QF 105 mm L13 of the Abbot self-propelled gun as a starting point (it used electrical primers).
4.5 inch gun may refer to: QF 4.5-inch howitzer, a British Army weapon of the World War I era; QF 4.5-inch Mk I – V naval gun, a British family of naval guns, actually of 4.45 inches (113 mm) calibre, in service 1938 through 2013; 4.5-inch Mark 8 naval gun, a British naval gun in service 1972 through at least 2018
From the BL Mark I gun of 1916 the 4.7-inch (120 mm) calibre was the mid-calibre weapon of the Royal Navy, used particularly on destroyers.Apart from some ships armed with QF 4-inch Mk V guns due to shortages, it remained the standard weapon for destroyers up to the W-class destroyers of 1943.
The 4.5-inch howitzer entered Irish service in 1925 to equip the newly formed 3rd Field Battery. Additional equipment received by the Irish Army in 1941 included four 4.5-inch howitzers. In 1943–44, 20 additional 4.5-inch howitzers were received. Thirty-eight 4.5-inch howitzers, all on carriage Mk1PA, were used by the reserve FCA.
The M8 was a 4.5-inch (114 mm) rocket developed and used by the United States military during World War II. Produced in the millions, it was fired from both air- and ground-based launchers; it was replaced by the M16 rocket in 1945.
102 mm (4.0 in) BL 4 inch Mk VIII & XI 40-caliber United Kingdom: World War I - World War II 102 mm (4.0 in) BL 4 inch Mk IX naval gun 45-caliber United Kingdom: World War I - World War II 102 mm (4.0 in) QF 4 inch Mk I - III 40-caliber United Kingdom: 1895 - World War I 102 mm (4.0 in) QF 4 inch Mk IV, XII, XXII 40-caliber United Kingdom
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).
It is also used in field target competitions, where it competes with .20 caliber (5 mm) and .22 caliber (5.6 mm) rifles. Steel BBs are typically slightly smaller than lead BBs at 0.175-inch (4.4 mm) diameter, although the bore diameter of the barrel are the same. Some air guns are designed to accept .177 pellets, .177 lead shot, or .175 steel ...