The Mi-4 went out of service with the development of the Mi-8.
==Specifikacije(AH-1Z)====Glej tudi==* Bell AH-1 SuperCobra* Bell YAH-63* Bell UH-1Y Venom* A129 International/TAI/AgustaWestland T-129* Boeing AH-64 Apache* CAIC WZ-10* Eurocopter Tiger* Harbin WZ-19* Mil Mi-28* HAL Light Combat Helicopter* Seznam helikopterjev==Reference====Zunanje povezave==* AH-1Z page on Bell Helicopter Textron web site* AH-1Z Viper page on US Navy RDA site* AH-1Z page on GlobalSecurity.org* Bell AH-1Z Super Cobra – Bell 449 on helis.com* "First Production H-1 Helicopters Rollout", Bell Helicopter, 27 September 2006* " AH-1Z Super Cobra Completes Envelope Expansion Testing", U.S. Navy, 9 January 2003.