The air spray gun consists of a container used for spraying paint or other liquids through a nozzle under pressure from a compressor onto a surface. It is suitable for painting any surface and leaves a perfect finish. A gravity-fed gun can be distinguished by the container located above the gun, aiding the liquid entering the gun by gravity, using less air pressure, and ensuring less overspray. They also have semi-transparent containers to see when the paint is running out. The siphon-fed guns have the container below the gun, making them easier to use. The container is generally made of metal or plastic and has the advantage that the gun can be placed anywhere without needing a holder.