It is not often that a small country appears at the top of the world rankings in some field. Czechoslovakia succeeded in the development and production of weapons in the 1930s. Small-caliber automatic weapons contributed significantly to this. And these weapons retained their excellent reputation even after the Second World War. This book is intended to recall their historical development from the creation of Czechoslovakia to its division into two states. And not only that. It should also express thanks to their creators, who were often forgotten.