Composite Internal Structure

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The Federated Suns introduced the Composite Internal Structure in 3061.[1] Inspired by the Endo Steel chassis, the FedSuns engineers produced a chassis that was light weight but wasn't as bulky as the Endo Steel skeleton. Though they were successful, the materials used in the Composite Structure were incredibly fragile.[2]


Game Rules[edit]

Any damage to a Composite Internal Structure is twice as damaging as that of an Endo Steel or even a standard BattleMech skeleton.[2]

Though the Composite Structure remains an Experimental Technology and restricted to BattleMechs, several combat units have taken advantage of its combination of light weight and lack of bulk to add additional weapons and equipment.


  1. Tactical Operations, p. 411, "Heavy WeaponsAnd Equipment Construction Data"
  2. 2.0 2.1 Tactical Operations, p. 342, "Composite Structure"