DIY rubber band minigun
Slingshot - crossbow
Foldable pulley crossbow
DIY spring crossbow
This topic is about how to build a flamethrower of fire extinguisher and couple of steel tubes
How to build a flamethrower
Throwing knifes - very interesting and skill entertainment. Theoretically, you can accurately throw a knife or any sharp-edged thing, but throwing knife is the best one. Large, heavy and balanced. Naturally, they cost money, but if you have old file or similar piece of iron... read this article, you can make of them throwing knives!
Homemade throwing knife