Ampulomet

The Ampulomet (, also rendered "Ampulomyot", "ampulla mortar", etc., lit. "ampule/vial thrower" cf. миномёт) was an expedient anti-tank weapon which launched a 125 mm incendiary projectile made of spherical glass. This weapon was introduced in 1941 and used (to a limited degree) by the Red Army in World War II, but by 1942 was largely obsolete.
Design.
 The weapon consisted of an unrifled tube with a crude breach mounted on a Y shaped pedestal which pivoted on trunnions to provide elevation. Two breech mounted inverted horns were provided for traverse/elevation and a simple inclinometer for targeting and range calculation. A black powder charge was inserted into the breech and fired by a percussion cap to propel the AZh-2 glass ampule. The ampules were filled with an incendiary mixture known as KS. KS was a mixture of 80% phosphorus and 20% sulfur which ignited when exposed to air. The burning mixture created a bright flame, thick white smoke and would burn for up to three minutes at temperatures between . The burning liquid would seep through vision slots or engine grilles on a tank and ignite ammunition or fuel as well as choke and blind the crew.
See also.
Northover Projector — A similar British weapon used by the Home Guard during World War II