Why go to all the trouble, you can still buy them assembled.
It is still possible to easily build from components an AR style rifle. The machined receiver is the registered component I have read. You could until the gun grab find the un-machined castings for that too. And I have read it depends on what state you live in if it is illegal to have one without a serial number.
The left is really wetting their panties.
If I had to, I could build a functioning rifle with a lathe. Do not need another project. hee hee hee
I don't think that many people will ever actually build this ugly and fragile plastic gun. What is priceless is that people like Schumer and Bloomberg HATE IT. They HATE something that cannot be controlled, registered and banned.
The 80% lowers that you are referring have no serial numbers because they are incomplete. All it takes is a drill press and a jig to make it complete. That’s a lot less expensive than a 3D printer. I am not sure if there are any states that would require a serial number to be stamped on the complete lower. (According to the ATF it isn’t a lower receiver until it is complete. Any time before that it is just a hunk of metal, hence no FFL transfer.) I would think this below the radar for most state representatives, they are just learning the difference between mags and clips.