Pistol upper legal to own?

[outbreaker]

I know the terminology. That is why I am considering building a pistol.
A SBR is another kettle of fish.
Why do companies sell pistol uppers and weapons if there is "no such thing"?
For me it would be a toy. No day to day practical use for me.

Side note SDW. Didn't think having spare build parts on hand was unusual. To each their own.

Having them is not unusual. You just have to make sure you have a non-NFA way to assemble them otherwise the ATF will assume you are assembling an NFA item.

Remember that the ATF has no problems killing your dog, you and your family to enforce its laws.