Chamber flags are great tools to indicate the status of a gun. They give a clear visual that a firearm action is not in a position to be discharged. Not only are they handy for the person handling the firearm, but they also send a signal to others in the vicinity that the gun is not charged. Some ranges and competitions even require their use.
The way chamber flags are traditionally used, the stem on the flag is inserted into the chamber. They may also be used by running the stem of the flag through the magazine well. This prevents the plastic from coming in contact with hot metal and does just as good a job of broadcasting that the rifle isn’t loaded.
These chamber flags are for .22 cal and larger rifles.