These are simply tools that I have made to use at shooting competitions, storage at home and transportation back and forth. These tools add an additional level of safety in letting not only yourself, but others around you know that a firearm is in a safe condition. 

They are NOT a replacement for a competent firearm user. The basic rules of firearm handling must always be followed, with or without an empty chamber indicator.

These models all have a component that when locked into place, prevents the bolt from closing. if the bolt is able to close for any reason, then the empty chamber indicator is not functioning properly and the firearm cannot be visually determined to be safe.

Eyelet on the bottom allows the attachment of an embroidered flag, or similar.