The “homemade” flamethrower of the Warsaw Uprising

 “The K pattern flamethrower” was a man-portable backpack flamethrower, secretly produced in occupied Poland during World War II for the partisans. 

Design work on a simple flamethrower suitable for clandestine production in ordinary workshops, of readily available materials, started in 1942 upon the request of the Home Army. Its main purpose was to be used against armored vehicles. More about this and other weapons of the Polish underground in Killing Warsaw.