[Ron Smith]

Viggo, I believe that the ser# that the law pertains to, is the Number on the frame or receiver of the firearm. This is the number which cannot be altered. As any part of a firearm can be mailed, sold or otherwise dispensed or imparted to another individual without adhereing to ATF regs.,or as common merchandise. With the exception of the frame. Which retains the ser# of that firearm. And for all intents and purposes is the firearm. As far as ATF is concerned.

Regards, Ron