So I would only have to separate the upper from the lower on my .22 LR and I wouldn't have to register? Piffle! I would prefer to have my gun at the ready, once it's properly sighted.
So I will disobey.
If I recall, it has to do with the bolt and/or firing mechanism and magazine having to be in the same device. Ergo, neither an AR upper nor lower are ‘firearms’ as described in the statute. The DOJ has been plea bargaining away cases to avoid this from becoming precedent.