Given the successes of the DRDO/ARDE/OFB and various private companies especially the Bharat Forge and TATA I think it would be the right time to start building a naval main gun. We can't be importing it all. Anything between 127-155 mm would do. We ought to start a project immediately and not let the expertise gathered from the ATAGS and various other projects go to waste.
Rail gun is the future, not cannon.