RFID??
Nope! It's a liberal conversion chip. Every time you grip the gun, it activates and the conversion process begins!
Errr, well, that might be a stretch. Maybe.
I would expect that RFID chips will be placed in guns pretty soon as they can easily been inserted into the plastic before it hardens and then you can't easily remove it without destroying the gun. Used to determine if a gun is present as you pass toll booths, traffic lights, parking structures, etc.
It would be funny if under the chip in the picture was the "penalty for removing this chip" tag where you couldn't see it until after it was removed. I do something similar with my game cameras in the woods by adding a note with the message:
"Congratulations, you have stolen camera #16. To steal this camera, you had to pass at least 4 other cameras, potentially more. The theft of this camera is not just petty theft, but is also destruction of evidence of a crime. A FEDERAL offense. You can return the camera with $100 inside or be prosecuted"