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 mount. [1] It was designed and built by United Defense, a company later acquired by BAE Systems Land & Armaments, which continued manufacture.

United States naval gun terminology indicates the gun fired a projectile 5 inches (127 mm) in diameter, and the barrel was 38 calibers long. The increased barrel length provided greatly improved performance in both anti-aircraft and anti-surface roles compared to the 5"/25 gun.

The 5"/54 Mk 42 is an automatic, dual-purpose (air / surface target) gun mount. It is usually controlled remotely from the Mk 68 Gun Fire Control System, or locally from the mount at the One Man Control (OMC) station.

Fully-automatic naval gun mount employed against surface (Anti-Surface Warfare - ASuW), air (Anti-Air Warfare - AAW), and land attack (Naval Surface Fire Support - NSFS) targets. The MK 45 gun...

2021年9月20日 · Fully-automatic naval gun mount employed against surface (Anti-Surface Warfare - ASuW), air (Anti-Air Warfare - AAW) and land attack (Naval Surface Fire Support - NSFS) targets.

5"/62 (12.7 cm) Mark 45 Mod 4 on USS Winston Churchill DDG-81. This latest version of the Mark 45 gun mount was designed to be used with the Extended Range Guided Munition (Mark 171 ERGM) in order to provide over-the-horizon range and improved lethality.

The Mark 42 5"/54 caliber gun (127mm) is a naval gun (naval artillery) mount used by the United States Navy and other countries. It consisted of the Mark 18 gun and Mark 42 gun mount. United States naval gun terminology indicates the gun fires a projectile 5 inches (127.0 mm) in diameter, and the barrel is 54 calibers long (barrel length is 5 ...

The Mk.45 Mod. 2 (5-inch/54-caliber) lightweight gun is a modern U.S. naval artillery gun mount consisting of a 5-inch (127 mm) L54 Mark 19 gun on the Mark 45 mount. Originally, the gun was designed and built by United Defense, it is now manufactured by BAE Systems Land & Armaments after the former was acquired.

Fully automatic, this lightweight gun system offers significant improvements in reliability and maintainability over the previous 5"/54 (12.7 cm) Mark 42 gun systems. The mount is unmanned above deck and all mechanisms have been greatly simplified.

The 54-caliber (Mk 45) lightweight gun provides surface combatants accurate naval gunfire against fast, highly maneuverable surface targets, air threats and shore targets during amphibious operations. This lightweight gun system offers significant improvements in reliability and maintainability over the 54-caliber Mk 42 gun systems.