Heavy-Lift Servo Heavy-Lift Servo is an item. Used to make Hulkbuster Limb Assembly.CraftingMade at Stark Table4RReinforced Servo Motor×4HHydraulic Actuator×4GIron Gear×1Used inHulkbuster Limb AssemblyMark 34 "Southpaw" PantsMark 34 "Southpaw" SuitMark 35 "Red Snapper" PantsMark 35 "Red Snapper" SuitMark 38 "Igor" PantsMark 38 "Igor" Suit