As noted by the U.S. Naval Institute ... The Mk 45 was designed as a replacement for the Mk 42 five-inch/54 caliber gun mount that was introduced in the early stages of the Cold War as a ...

It is used in a variety of rotor wing aircraft in the “door gunner” position and is used by the U.S. Navy for its riverine ... the Browning M2 .50 caliber machine gun had been rendered ...

The Browning M2 .50 Caliber Machine Gun, Heavy barrel is an automatic, recoil operated, air-cooled machine gun with adjustable headspace and is crew transportable with limited amounts of ...

The U.S. Navy expanded a contract with BAE Systems ... The company will extend the barrel of the Mk 45 to 62 calibers and ...