The QF 4.5inch gun has been the standard medium-calibre naval gun used by the RoyalNavy as a medium-range weapon capable of use against surface, aircraft
The 4.5inch Mark 8 is a British naval gun system which currently equips the RoyalNavy's destroyers and frigates, and some British destroyers and frigates
The 5-inch (127 mm)/54-caliber (Mk 45) lightweight gun is a U.S. naval artillery gun mount consisting of a 5 in (127 mm) L54 Mark 19 gun on the Mark 45
developed by the RoyalNavy. It was deployed on capital ships from 1915 until 1959 and was a key RoyalNavy gun in both World Wars. The BL 15-inch Mk I, designed
equipment used in the RoyalNavy. Category:Naval ships of the United Kingdom List of active RoyalNavy ships List of active ships of the Royal Fleet Auxiliary