VA - stripped lowers and pistols vs rifles
So my understanding over the past few years was that you did not need an AR lower that was advertised as a pistol lower, as long as it was annotated as a pistol on the form (4473 I think?). I picked up a stripped lower yesterday, with the intent of building it into a pistol with an SBA3 and was told by the LGS that that was no longer the case, at least in VA. According to them they're marked as "other," meaning they can be built into whatever I want. I have a few questions that I should've asked them but didn't think of at the time and since I hadn't seen this discussion on here, figured I'd ask.
1. Is this only in VA or was this a federal thing?
2. Does this only apply to stripped lowers?
3. Does this have any effect on lowers that were bought before the law changed (doubt it, but figured I'd ask)?