Please excuse my ignorance on this matter, but why are people so concerned about "untraceable" guns (i.e. guns without serial numbers)? IF a gun is used in a crime, how important is it that there's a serial number stamped on the receiver? As opposed to, say, ballistics showing that a particular gun was used in a crime because of the rifling marks found on the bullet fragments and the firing pin indentation on the shell casing?
Sure a serial number will tell who the original purchaser of the firearm was, but that in itself does not necessarily prove that the original owner is the one who committed a crime.
Sure a serial number will tell who the original purchaser of the firearm was, but that in itself does not necessarily prove that the original owner is the one who committed a crime.