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A Firepower kill or (F-kill) refers to damage inflicted by a weapon on a vehicle that destroys its weapon systems, or substantially reduces its ability to deliver weapons accurately.

Typically this term is used to refer to tanks and other armoured vehicles that have their guns or missile system damaged. Many modern tanks feature ammunition compartments designed to fail safely under fire rather than result in a catastrophic kill—when damaged, vents open to channel ignited propellants and explosives away from the crew cabin. The firepower-killed tank can then return to a maintenance center with its crew intact.