I assume you mean Stockpiling, and no, it was not. The assassination of the Archduke was.

Coal, steel, printing, weapons, paper money, gunpowder, mechanical clock and more

All weapons have a saftey, it is the USER. If you mean a mechanical one, some revolvers do and some don't

To build weapons, you would need an engineering degree. A mechanical engineer, systems engineer, nuclear engineer, or aeronautical engineer could play a part in the design and construction of weapons.

The governor of Andersonville prison camp (Wirz)

The landlady of the Maryland boarding-house where Lincoln's assassination was planned, and the weapons and ammunition distributed. (Mrs. Surratt).