So some of you may have seen this. I haven’t before. A gun disguised as a key fob was found by police. Pulling the key ring resets the firing pins. Then you press the buttons on top to release them and the gun fires. This would be considered an AOW (Any Other Weapon)
Last year Russian Youtube Channel NK12NET built one and documented making it. It looks like he chambered it in .22 short.
According to NK12NET, the gun is called the WASP and was made by a Bulgarian engineer.