Most modern naval large guns are still "Drop in the can, then hook it up" kind of affairs. Which is why many wrecks lack turrets: they fell right out as the ship rolled while sinking.
Some are secured in, but as a rule, even the 50+ tons of metal on a modern turret gun mount is a canister that drops into a socket. Mind you, not all. Just most.
Some are secured in, but as a rule, even the 50+ tons of metal on a modern turret gun mount is a canister that drops into a socket. Mind you, not all. Just most.