ACH47A Armoured Chinook

The ACH-47A Chinook Guns-A-Go-Go, with a crew of eight, was armed with up to five M2 .50 Cal. or M60D 7.62mm machine guns (four window and one ramp mounted), and two fixed-mounted M24A1 20mm cannon and two M18/M18A1 pod-mounted 7.62mm miniguns , or two 19-tube 2.75 inch rocket launchers, and a chin-mounted 40mm automatic grenade launcher on the M5 armament subsystem. They also featured added armor protection for the crew and some critical components.

   During the Vietnam War three test ACH-47 Chinooks, nicknamed "Easy Money," "Stump Jumper" and "Birth Control" were deployed for six months temporary duty in Vietnam. A fourth ACH-47A, called "Cost of Living," was the prototype and therefore stayed in the United States for flight testing. Though these armed birds had a successful evaluation period, each destroyed every assigned target they engaged, three succumbed to fate.