Gun racks are typically made out of wood or plywood, which can be stained or treated with lacquer or varnish if so desired. Some sturdier examples are made from Baltic birch plywood
On average, most gun racks can hold anywhere between 4 to 6 guns. Most gun racks that you hang on the wall holds around 4, whereas most gun racks that stand up can hold around 6.
Gun safes are typically constructed from steel plating with fire-insulating material in them. The steel walls are usually quite thick, as much as an inch thick in some safes.
Typically steel or aluminum
Wood, metal, plastic
Depending on the gun most high end markers are made out of Anodized aluminum.
That is part of it. Difficult to explain, but examination of the entire gun- how it is made, what material it is made from, how assembled, etc. Markings on the gun are also key.
Made from surrendered enemy gun metal.
Air gun pellets are made out of lead or some other soft material.
No. Nerf darts are made out of foam and rubber, which are made out of petroleum, a nonrenewable material.
In the early 19 hundreds the material that cost to make a "two dollar pistol" was cheap (the guns sold for $2) therefore the material when the gun with fired would heat up hotter than the material use on a more expensive gun made with better material.
While there is no definitive way to answer this question, the French Chauchat machine gun typically bears the distinction of being one of the worst weapons made in its class.
Such information is typically not made available to the general public, nor should it be.