A single-shot disposable flamethrower originally developed for the Waffen-SS, but distributed late in the war to Volkssturm and Werwolf groups, FallschirmjagerParatroops, and some regular Heer troops.
This was made in two calibers. The configuration of the pistol was different depending on which caliber it was chambered in, so you get bonus Turkey Points if you can correctly identify the caliber based on the image.