Why not rip the turrets off two of those vehicles anx plent them onto the Zumwalt destroyers.
Instant shore bombardment capability.
They would have to navalize them, which isn’t just a matter of slapping Navy logos on them. Lots of US Army vehicles and tech do not do well when installed on a ship.
On the other hand, a better option would be to rip the stupid AGS barrel out of the Zumwalt turrets then swap in this cannon and change the control software. The turret is already navalized and it’s engineered for the recoil of the AGS super long range 155mm (which for some stupid reason isn’t compatible with any existing 155mm munitions).
The Germans did it, literally.
https://en.m.wikipedia.org/wiki/MONARC
http://www.navweaps.com/Weapons/WNGER_61-52_MONARC_Hamburg_pic.jpg