5"-62 caliber gun
The 5-inch, 62-caliber gun is the main dual-purpose gun for naval gunfire support, some anti-surface warfare, and limited anti-air warfare on newer U.S. Navy warships. It is the successor to 5"-54 caliber guns, both the Mark 42 and Mark 45 versions. 
The weapon is controlled by the the Mk 160 gun weapon system (GWS), which also can control the 5"-54.
A significant operational advantage is that this gun can fire the Extended Range Guided Munition (ERGM) rocket-assisted guided shell which has a 63 nmi range in comparison with the 13 nmi (14.9 statue miles) range of the unguided shell. It is capable of Multiple Round Simultaneous Impact (MRSI).
- MK 45 5-inch / 54-caliber (lightweight) gun; MK 45 5-inch / 62-caliber (MOD 4 ERGM) gun, Federation of American Scientists