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Mk-45 5-inch Gun

The Mk-45 (5-inch/54-caliber) lightweight gun is a modern U.S. naval artillery gun mount. It is designed for use against surface warships, anti-aircraft and shore bombardment to support amphibious operations. The gun mount features an automatic loader with a capacity of 20 rounds. These can be fired under full automatic control, taking a little over a minute to exhaust those rounds at maximum fire rate. For sustained use, the gun mount would be occupied by a three-man crew (gun captain, panel operator, and ammunition loader) below deck to keep the gun continuously supplied with ammunition.

Crew

Operators
Gun Captain
Panel Operator
Ammunition Loader

Mk-45 Mod.2 5-inch Gun

The Mk-45 Mod.2 consists of a 5-inch (127 mm) L54 Mark 19 gun on the Mark 45 mount.
Mk-45 Mod.2 5-inch Gun

Characteristics

Dimensions
Caliber: 127 millimeters 5 inches
Barrel length: 6.86 meters 270 inches
Features
Ammuni9tion capacity: 20 rounds
Elevation: -15° to +65°
Rate of fire: 16-20 rounds per minute
Effective range: 13 nautical miles (24.8 kilometers) (14.96 miles)

Mk-45 Mod.4 5-inch Gun

The Mk-45 Mod.4 version consist of a longer barrel L62 Mark 36 gun fitted on the same Mark 45 mount.