I'll have to check.I i think an error 600 for the two guns and 320 in a different magazine, if someone can confirm.
For MRSI capacity he have it as last SPG IIRC the first which have it is the terrible PzH 2000, i think is a unique capacity for a ship.
But the Zumwalt's will be the first with the Rail Gun...and I am sure at some point a Laser for CIWS.
I believe the Ford class is going to have more than enough power for CIWS lasers and Rail guns as well eventually.
Bliitzer says it can put a smaller 127mm rail gun on the Burkes...but I am concerned about the power requirements.
I do not know if they are planning to do anything to the flight II vessels, or maybe even the technology insert group (eith I believe) to increase the power available.
The US Navy needs to design and build a CGX to replace the Ticonderogas, and that ship should have the electrical power like the Zumwalts.
In fact, IMHO, the CGX should be an AEGIS cruiser version of the Zumwalt. Use the same hull. Add the larger AEGIS radars. Increase it to 128 VLS. Use laser and rail guns for CIWS. Then build about 20 of them to help control the costs.