M18 grenade

Diagram and cross section of the AN M18 smoke grenade.

US Marines 100520-M-9232S-012 M18 green smoke grenade crop

Smoke billowing from a green M18.

The AN-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.

Army/Navy Model 18 Colored Smoke Grenade (AN-M18)
Color/Markings: Olive drab body with yellow markings, the top painted red, green, yellow, or violet to indicate 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 hazardEdit

With both the AN M8 and AN-M18, there is a danger of starting a fire if it is used in a dry area.

Field Expedient UseEdit

When employing the M18 or AN-M8 HC hand grenade, it may be desirable to use one of these grenades without the fuze. To do this, the following procedure should be used in combat only:

  1. Remove the tape from grenade bottom to expose the filler.
  2. Remove the fuze by unscrewing it from the grenade.
  3. Ignite starter mixture with open flame.
  4. Immediately throw the grenade to avoid burn injury.

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