4.5-inch Mark 8 naval gun

The 4.5 inch Mark 8 is a British naval gun system which currently equips the Royal Navy's destroyers and frigates, and some British destroyers and frigates sold to other countries.

4.5-inch Mark 8 naval gun
4.5-inch Mk 8 Mod 1 naval gun on HMS Defender. The multi-faceted gunhouse is designed to reduce radar cross section.
TypeNaval gun
Place of originUnited Kingdom
Service history
In service1972–present
WarsFalklands War
Invasion of Iraq 2003
2011 military intervention in Libya
Production history
DesignerMod 0 : Royal Armament Research and Development Establishment
Mod 1 : Royal Ordnance Defence
VariantsMod 0, Mod 1
Specifications
Barrel length244.75 inches (6.217 m) bore (55 calibres)

Shell113 x 700mmR
Fixed QF 46 pounds (21 kg) HE
Calibre4.45-inch (113 mm)
Rate of fire25 rounds per minute automatic
Maximum firing range27.5 kilometres (17.1 mi)
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