You missed the point. I wasn’t referring to the WW2 production, but to the armaments that were formerly belonging to the Czechoslovak army and were transferred directly to Wehrmacht in 1939 and subsequently used against Poland (which itself invaded Czechoslovakia side by side with Germans year before) and against France (which forced Czechoslovakia to surrender without fight in Munich).
Sooner or later, gunpowder weapons would be used also in the battlefield, but it can not be disputed that their employment by Žižka was a milestone in military strategy.
Also, when it comes to firearms - please see Japan history. They were eventually banned in Japan because they allowed the common folk to easily kill the war caste. In Europe they led to the fact that heavily armed and thoroughly trained knights could be taken down by peasants. If they were not actually introduced by a peasant army (Hussites), they could have had the same fate as in Japan (at least for some time). Even more so considering that fighting on the battlefield was taking place mostly among peers in European armies, i.e. high noble vs high nobles, low noble vs low nobles, etc., and they would not normally attack enemy from different social strata, even if given ample opportunity (I might not be best informed as regards the time and area regarding this phenomenon, so please feel free to correct me).
It has next to no impact on today even in the Czech Republic, not to mention abroad. Unlike the 15th century Czech reformation or advancements in military strategy.