Canada is also deeply tied to work on the new guns, which aim to offer improvements in range, accuracy, and lethality.

The gun was first deployed in 1971 as the Mk 45 Mod 0, and has been updated in the more than five decades since. With the final retirement of the United States Navy’s Iowa-class battleships in the ...

The destroyer Rafael Peralta fires its Mark 45 5-inch light-weight gun during a live-fire exercise while operating in the Philippine Sea in January 2023. (MC1 Greg Johnson/U.S. Navy) The U.S. Navy ...