The 5-inch /54-caliber lightweight gun is a U.S. naval artillery gun mount consisting of a 5 in L54 Mark 19 gun on the Mark 45 mount. The later 62-calibre-long version consists of a longer-barrel L62
5-inch/62-caliber Mark 45 Mod 4, in flat-panel gun turret, test firing on USS Forrest Sherman
Mod 2
Mod 4
A Mod 2 gun aboard the Australian Anzac-class frigate HMAS Arunta
4.5-inch Mark 8 naval gun
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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.
5-inch/54-caliber Mark 45 gun
…System. Since before World War II, 5 inches (127 mm) has been the standard gun caliber for U.S. Naval ships. Its rate of fire is lower than the British 4.5 in (114 mm) gun, but it fires a heavier 5-inch (127 mm) shell which carries a larger burst charge that increases its effectiveness against aircraft. Used mechanical…
4.5-inch Mk 8 Mod 1 naval gun on HMS Defender. The multi-faceted gunhouse is designed to reduce radar cross section.
Spent shells from HMS Cardiff's Mod 0 gun during the Falklands War. The top of her worn Sea Dart launcher can also be seen in the bottom right corner.
The ladder to Cardiff's Mod 0 gun can be seen here, damaged by a freak wave.
HMS Sutherland's Mod 0 gun