AC6 or AC-6 may refer to: Aviastroitel AC-6, a glider , a US Navy refueling ship Southern Pacific class AC-6, steam locomotives AC-6, a utilization category in electrical engineering, defined by the International Electrotechnical Commission Ace Combat 6: Fires of Liberation, a 2007 video game Armored Core VI: Fires of Rubicon, a 2023 video game