Small arms of the 15th century, the device had an S-shaped rod with an axis?
The question refers to the first small arms, which later turned into a gun. Arquebus appeared in Germany in one thousand three hundred and seventy-nine. Arquebus was loaded with stone or lead bullets from the muzzle. To activate the weapon, the arquebus had a special regiment, where gunpowder was poured.
The S-shaped rod was needed to ignite the gunpowder.
The answer to the question is ARKEBUSA.
Most likely this is an arquebus. A large-sized gun, into the barrel of which a round lead bullet was driven with a ramrod.
Well, the S-shaped rod was needed in order to ignite the gunpowder poured onto a special shelf. When the rod was turned, a burning wick, clamped in the rod, was brought up to the gunpowder.