AN M18

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Diagram and cross section of the AN M18 smoke grenade.
Smoke billowing from a green M18.

The M18 Colored Smoke Grenade is a US Army grenade used as a ground-to-ground or ground-to-air signaling device, a target or landing zone marking device, or a screening device for unit movements. It is not designated the "AN-M18" but "M18." It can be seen repeatedly in the film Apocalypse Now 1979. It was discovered in Vietnam that the green smoke drove away swarming bees.

Model 18 Colored Smoke Grenade (M18)
Color/Markings: Olive drab body with yellow markings, the top painted red, green, yellow, or violet to indicate the smoke color. In World War II the M18 had a light gray body with a yellow band and markings and the top in the smoke color.
Body: Body: Sheet steel cylinder with four emission holes at the top and one at the bottom to allow smoke release when the grenade is ignited.
Fuze Assembly: M201A1 Pull-ring Igniter. A "mouse trap" type igniting fuze with a 1.2 to 2.0 second delay. Ignition ignites the filler and expels it from the grenade body.
Filler: 11.5 ounces of a colored smoke mixture. Comes in red, green, yellow, or violet.
Weight: 19 ounces.
Safety clip?: No.
Range: Can be thrown 35 meters by an average soldier.
Duration: The grenade produces a cloud of colored smoke for 50 to 90 seconds (0.85-1.5 minutes).

Potential hazard [edit]

With both the AN-M8 and M18, there is a danger of starting a fire if it is used in a dry area. New smoke mixtures are under development that are less harmful if the smoke is inhaled.

See also [edit]