Memory Gun

The memory erasing gun is a contraption used by the Blind Eye Society to make several residents of Gravity Falls, Oregon forget supernatural encounters.

History
It was created by Old Man McGucket originally for the purpose of him forgetting certain memories, due to the guilt of helping the Author write the journals. He eventually began using it so frequently he lost much of his memory, and became senile. The members of the Blind Eye Society decided to use the device in order to help the citizens of Gravity Falls forget "all the things that go bump in the night".

In "Society of the Blind Eye," it is used on Lazy Susan so she'd forget about seeing mystical gnomes. When Mabel got her hands on it she wanted to use it to forget about her past relationships but ultimately decided not to. Later, the society members tried to use it on Dipper and his friends when they were discovered, only to fail and get their own memories erased.

Use

 * Memories erased by the gun are stored in The Hall of the Forgotten.
 * Several members of the society use the gun on themselves, including Bud Gleeful and Blind Ivan.
 * List of people known to have had their memories erased by the society members:
 * Old Man McGucket
 * Robbie Valentino
 * Lazy Susan
 * Preston Northwest
 * Pacifica Northwest
 * Mrs. Gleeful
 * Jefferey Cannuck

Side effects
Use of the device has side effects after repeated use. The severity of the effects increases with the amount of use, ranging from minor brain damage to total memory loss and going insane. The device's inventor, Old Man McGucket, used it on himself more than anyone else; he slowly went insane and lost all of his memory in 1982. McGucket also became immune to any further memory wipes, as seen when Blind Ivan attempted to use it on McGucket.