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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).
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; BL 4.5-inch Medium Field Gun, a British Army field gun of the World War II era
The QF 4.5-inch (110 mm) howitzer was used by British and Commonwealth forces in most theatres, by Russia and by British troops in Russia in 1919. Its calibre (114 mm) and hence shell weight were greater than those of the equivalent German field howitzer (105 mm); France did not have an equivalent.
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.
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 ...
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 BL 4.5 inch medium gun was a British gun used by field artillery in the Second World War for counter-battery fire. Developed as a replacement for the BL 60-pounder gun it used the same carriage as the BL 5.5-inch medium gun but fired a lighter round further. It had nothing in common with the QF 4.5 inch Howitzer or the QF 4.5 inch AA gun.
The fixed Mk V ammunition was 44.3 inches (1.13 m) long and weighed 56 pounds (25 kg), while the projectile was 31 pounds (14 kg). [ 12 ] Fixed QF cartridge for LA (low-angle) gun, 1930s