400mm Coil Guns

The 400mm coil guns first appear in Grimm's Legacy as the pinnacle of naval armament, three massive turrets fed by dedicated reactor pathways and capable of hurling projectiles at 30,000 kilometers per second. Across the series they evolve from experimental ship-killers into the backbone of fleet doctrine, their raw velocity and power later refined by improved targeting algorithms, variable-yield warheads, and integration with AI fire-control systems. By the later books they are no longer standalone weapons but networked nodes in a battle lattice, their individual might multiplied by coordinated salvos that can crack planetary shields or carve through dreadnought armor in seconds.