Pistol upper legal to own?

[outbreaker]

I was not worried about the 16" barrels. Just examples of parts I have on hand.
I am considering getting a pistol upper to add to the pile as well.
I have two unbuilt lowers that were transfered as "Other".
As I stated earlier I will just build one of those with a brace, buy the pistol upper and take a few pictures to avoid any gray areas.

With the new pistol brace rulings not finalized I would not have a brace on the pistol but just a buffer tube.