Item #: SCP-2411
Object Class: Keter (but people below level 5 clearance level think it's neutralized)
Laconic Containment Procedures: SCP-2411 is to be kept in a high-security vault.
Laconic Description: SCP-2411 is a gun that kills everyone else in the organization that person works for.
Additional Context: The Foundation was going to test it with Class-D personnel, but then they discovered that doing that would kill the entire Foundation. They made a fake article for people below level 4 clearance level that says it just kills people randomly, so nobody would be tempted to use it. Everybody else was also told that it had been destroyed, but it wasn't actually destroyed in case they needed to use it at some point.