The Kayaba Type 90, an example of a Flare Gun.
A flare gun, also known as a signal pistol, is a type of firearm that is designed to shoot flares into the air. It is commonly used for signaling or as a distress signal in emergency situations. The flares that are shot from a flare gun can produce bright and colorful light, which makes them easily visible from a distance.
Flare guns are typically designed to be compact and lightweight, which makes them easy to carry around. They are often made of metal, such as steel or aluminum, and feature a single or double-barrel design. The barrel is usually smooth-bore and can be either fixed or detachable. The gun is usually loaded by inserting a flare into the barrel and then firing it by pulling the trigger. Some flare guns can be loaded with multiple flares at once.
Flare guns are typically used in military operations as a signaling device or to create a distraction, rather than as an actual weapon. They are often used to mark targets, indicate troop movements, or to signal for help.