Just about any you can think of
Depending on the guns- steel, brass, aluminum, copper, nickel, other metals, wood, and various plastics.
Gunpowder NEVER WAS used to make guns.
Spyder uses a few different types of metals. They mostly use aluminum in their guns. Though to make it lighter they use a composite plastic that is durable yet light.
Their high conductivity is why transition metals are used to make electrical wires.
Steel and aluminum are used to make funs.
Aluminium.
The two most common metals used to make knives are steel and iron.
Metals are used for the production of screws as they are materials with high hardness and resistance to stress.
Depends on the exact gun. Steel, composite metals, aluminum, and polymers are all used for various types of firearms.
Lead
copper and zinc
alloys