@Fk Nascimento To be precise, they used a sling -a pouch on straps or strings that works off centrifugal force- rather than a slingshot -a minicatapult that works off the elasticity of its materials. The difference is important -the first is far more devastating when you're dealing with Earth materials and physics.
The Galactic Navy Officer Becomes an Adventurer
by Takuma Tomomasa , A_Itoh
Available on mangabuddy for reading, and for sale at https://www.amazon.com/dp/B0BT6V7CMM
by Takuma Tomomasa , A_Itoh
Available on mangabuddy for reading, and for sale at https://www.amazon.com/dp/B0BT6V7CMM