Visible railguns leave a gap in the BC-304 weapon mix

Are the BC-304's visible railguns too small, and what weapons are missing between point defense and nuclear missiles?

The turrets are probably around forty millimeters, but heavier long-rail weapons and fighter-style missiles would fill important gaps in range and effect.

A commenter argues that the original BC-304 lacks a clearly heavy railgun and a medium-range missile battery. The reply judges the visible turret weapons more likely to be around forty-millimeter caliber than rifle-sized once their firing scale is considered. The exchange nevertheless exposes the limited weapon mix between rapid-fire defensive guns and enhanced nuclear missiles. Long keel-mounted rails and AMRAAM-like missiles adapted from the F-302 would create additional choices against targets that do not justify the largest weapons.