17" CIWS
Same fire rate.
Edit: Okay, imma do some math. Let's be generous and use a 16" gun because I couldn't find a modern 17" gun.
At 1,225 kg and 75 rounds/second that's 91,875 kg or almost 92 tons of projectiles going down range.
At 762 m/s for the AP projectile that would be 7.001 × 10^7 N of force, or 77.5 Boeing 747s at full thrust.
That ship might roll a tad.
My General saying "Nuh-uh!" beats your Major.