M18 and M20 recoilless rifle.
 

M18

The M18 was a reload able grenade launcher that could fire different types of ammunition. Despite its heavy weight it could be fired directly from a soldiers shoulder due it its weak recoil. The range was a little less than 4000 meters and it was a very effective support weapon.

M20

The French also used the American M20 grenade launcher, a larger grenade launcher of the caliber 75 mm. It had a more powerful warhead but was heavier and more difficult to transport.

Caliber: M18 – 57mm, M20 – 75mm.

 

French troops under retreat from Hoa Binh carrying a grenade launcher M18, 57mm, 1952

 

75mm M20