Tags: Weapon.
The QF 4.5 inch gun has been the standard medium-calibre naval gun used by the Royal Navy as a medium range weapon capable of use against surface aircraft and shore bombardment targets since 1938. This article covers the early 45-calibre family of guns up to the 1970s. For the later unrelated 55-calibre Royal Navy gun see 4.5 inch Mark 8 naval gun.Like all British nominally 4.5 inch naval guns the QF Mk I has an actual calibre of 4.45 inches (113 mm).
