400mm Main Battery Turret

The 400mm Main Battery Turret first appears in Book 8 of Grimm's Military Sci-Fi Series as a cornerstone of capital-ship armament, representing the pinnacle of conventional naval gunnery. Across the series, it evolves from a static, crew-served weapon system into a semi-autonomous, AI-assisted platform capable of engaging both surface and orbital targets. Its role shifts from ship-to-ship duels to planetary bombardment and finally to last-line defense against swarm threats, illustrating the changing nature of warfare in the Grimm universe.