Flare Gun (FarCry 4)

“Flare guns can be used to set things on fire from a distance, take out enemy personnel, or to create distractions. Just remember that they are single-shot weapons.”
— in-game handbook

“This is a flare gun, sometimes called a “signal pistol”. But the last thing you would use a flare gun for is signalling for help. Why would you want to attract attention to yourself? Flare guns can be used to save your life though, such as when you shoot someone in the face or groin. Remember, in a fight between a flare gun and someone’s groin, the flare gun wins.”
— Survival Guide