The M18 saw service primarily as the turret-less M39 Armored Utility Vehicle which was used as a prime mover, infantry carrier, and ammunition carrier.
 A number of variants were proposed including a mobile command post, howizer variant, and flamethrower variant.
The tank destroyer was also used as its original purpose intended.
The M18 saw service primarily as the turret-less M39 Armored Utility Vehicle which was used as a prime mover, infantry carrier, and ammunition carrier.  A number of variants were proposed including a mobile command post, howizer variant, and flamethrower variant. The tank destroyer was also used as its original purpose intended.
M18 Hellcat