120mm Secondary Battery

The 120mm Secondary Battery debuts in "Grimm's Legacy" as a modular, dual-purpose turret system that bridges the gap between point-defense lasers and main-battery railguns. Throughout the series it evolves from a hastily retrofitted add-on on aging cruisers to a fully integrated, AI-slaved weapon suite capable of autonomous target selection and rapid ammunition switching between kinetic and proximity-fused shells. Its maturation mirrors the fleet’s shift from desperate rear-guard actions to coordinated, multi-axis fleet engagements, culminating in its decisive role during the final defense of the Sol perimeter.