M2 flamethrower
The M2 flamethrower was an American, man-portable, backpack flamethrower that was used in World War II, the Korean War, and the Vietnam War. The M2 was the successor to the M1 and M1A1 flamethrowers. Although its burn time was around 7 seconds long, and the flames were effective around 20–40 meters, it was still a useful weapon. With the arrival of flamethrower tanks, the need for flamethrower-carrying infantrymen to expose themselves to enemy fire had been greatly reduced. Though some M2s were sold off, the majority were scrapped. Combat use. Second World War. The M2 flamethrower  saw combat use in the Pacific theater, being deployed to combat strongly fortified and entrenched Japanese positions. Following the success with the M1 flamethrower, the M2 was developed and put into combat use in 1943. Towards the end of the conflict, later models of the M2 were equipped with the fuel-thickening agent known as napalm. Variants of the M2. The M2 was the WWII model had hexagonal gas caps and hourglass frames. It was also called the M2-2, M2 for the tank groups and -2 for the wand type. The M2A1-2 is the variation of the M2  devised during the Korean War. These had straight sided backpack frames, vented gas caps, a cylinder sized regulator and a safety valve. These are much more common today than WWII models. M2A1-7 was a flamethrower used by the American troops during the Vietnam War. It is the updated version of the M2A1-2 unit used during The Korean War. It has four controls: The M9A1-7 was the most common model used in Vietnam and is much lighter and easier to use. Tanks for this weapon are commonly found, but most wands were destroyed after the Vietnam war. Some  U.S. Army flamethrowers have a front handgrip with the same shape as the rear handgrip. In these models the igniter controls are on the front handgrip, arranged in the same way as the rear handgrip controls. The M2 was replaced by the M9A1-7 flamethrower which was used in Vietnam. The M9A1-7 was replaced by the M202A1 FLASH.