capt
Microstamping, or ballistic imprinting, is a patented process that uses laser technology to engrave a tiny marking of the make, model and serial number on the tip of a gun’s firing pin to allow an imprint of that information on spent cartridge cases.
...another good argument for revolvers.

Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!