[toddst]

I just bought a new upper for a Glock. Guess what: if the gun had been 'fingerprinted' before, that information would now be useless.

You make a logical point. However, if the bullet "fingerprinting" law was to pass, every replacement barrel would no doubt be included. We would have a larger ATF army than now to be sure you "comply" with the law. Sound like fun yet?

We've got to kill this monster (proposed law) now.

[B4Ranch]

If you gave me a "FINGERPRINTED " barrel, in less than 10 minutes I could change every detail of the fingerprint with steel wool and a round file.