Editing Hydra 70 (section)

===United States===
In the [[United States Army|U.S. Army]], Hydra 70 rockets are fired from the [[AH-64 Apache]] and AH-64D Apache Longbow [[helicopter]] variants using M261 19-tube rocket launchers, and the [[OH-58D Kiowa Warrior]] using seven-tube M260 rocket launchers. In the [[United States Marine Corps|U.S. Marine Corps]], either the M260 or M261 launchers are employed on the [[AH-1W SuperCobra]] and [[AH-1Z Viper]], depending upon the mission. The M260 and M261 are used with the Mk 66 series of rocket motor, which replaced the Mk 40 series. The Mk 66 has a reduced system weight and provides a remote [[fuze]] setting interface. Hydra 70s have also been fired from [[UH-60]] and [[AH-6]] series aircraft in US Army service.

The [[AH-1 Cobra|AH-1G Cobra]] and the [[UH-1 Iroquois|UH-1B "Huey"]] used a variety of launchers including the M158 seven-tube and M200 19-tube rocket launchers designed for the Mk 40 rocket motor; however, these models have been replaced by upgraded variants in the [[United States Marine Corps|U.S. Marine Corps]] because they were not compatible with the Mk 66 rocket motor. The Hydra 70 rocket system is also used by the [[United States Navy|U.S. Navy]], and the [[United States Air Force|U.S. Air Force]].