Flare Gun

The Flare Gun is a Weapon you can find in-game.

About
The Flare Gun is a specialty orange colored handgun with only one round loaded in the chamber. Upon hitting Jason, or firing a shot that goes near him, it will mark him on the map for all counselors to see; this lasts for a handful of seconds. An equippable perk known as "Pyro" will extend the duration of the marking on the map when used.

You don't need to hit Jason with the flare to mark him on the map; simply firing a round near him works. In this sense, even a missed shot can still contribute to the team's survival. However, hitting him with a projectile from this weapon is a guaranteed way to stun him. As a result, it can be used to stun Jason from far away while staying out of his grab range; this makes it a potent weapon even in the hands of counselors with low fighting potential (e.g. Deborah).

The stun duration lasts a few seconds longer than normal if you strike Jason in the face with this weapon, and you're rewarded additional points for doing so. The shot can also ricochet which gives you the opportunity to bank shots off a surface in order to hit him from behind.

Trivia

 * During the Beta, the flare gun was an item; it could be found inside drawers.
 * It was originally fired into the air automatically, and if shot inside a cabin it would bounce around (which still happens in-game).