Yes, Cholo, you are wrong.
I don't have much tolerance for fear-mongering, nor for propagation of untruths, either of which is what you're doing. So take the information given to you in this thread - adding extra serial numbers on firearm parts will not force any addition parts to become Title 1 firearms, subsequently requiring FFL involvement or 4473 FTR's.
The ATF has never looked to the manufacturers to be told which part is the receiver, colloquially dubbed, "the gun." The post above which suggests the advice, "the part with the serial number is the gun," has NEVER been the advice of the ATF, and would only be the BAD advice of someone not sufficiently knowledgeable to give it.
The ATF instructs manufactures on where the serial number must be placed. If the manufacturer satisfies that, the ATF doesn't care where else it might appear. Having the same number extra places doesn't change anything in their ruling or definition of component parts.
Glocks have had serial numbers on barrels and slides for decades. Many bolt rifles used to have serial numbers stamped into the inlet channel. Revolver makers, Ruger included, have scribed digits of the serial into cranes and cylinders for decades as well. None of these things have ever affected their legal status as a component vs. Title 1 firearm. The laser engraving on the barrel is new for Ruger, but it's not new, and it won't affect any ATF requirements.