U.S. helicopter armament subsystems
Helicopter armament systems developed by the United States military since the early 1960s include offensive and defensive weapons and gear of various types, including machine guns, grenade launchers, autocannon, and rockets. == Introduction == The United States Army began to experiment with air mobile tactics during the Korean War, and by 1962, was developing armed helicopters for attack and defense.
Source: Wikipedia — U.S. helicopter armament subsystems (CC BY-SA 4.0)