A tracer gun, sometimes known as a disc gun, is a kind of toy gun made of durable plastic. The toy shoots lightweight plastic discs roughly the size of a penny. The discs used as ammunition for these guns are often sold with the label "Jet Discs." The firing mechanism is a spring, The magazine holds 20 "discs." Range is about 10 feet, and even then, accuracy is far from dependable. The trigger requires some force. The firing sound is loud, low, and distinctive. Oftentimes the trigger will become loose and will take multiple attempts to shoot.