This was interesting. I initiated an AR transfer, and the guy said "just the receiver right?" and I said, "no has an upper on it". He started in that I was in violation of the law and that it was on record as a receiver only and that I am required to report it as a complete upper and lower...blah blah. Instead of arguing with him, I said "yes, I'm calling to say that 5 minutes ago I put an upper on this lower receiver, and I want to make a transfer."
I don't like to argue with government, I'm not going to win, but I may just call in and tell them that I took the parts off of all my AR's and they are just receivers now. I can see them come calling for "complete guns" when the confiscation starts. I plan to only hand over stripped receivers. I have never heard of this "required to report it as a complete gun stuff". I know "never ask legal questions on a forum" but honestly, in Canada there is no place to call and ask for answers to legal firearm questions, as everyone just gives a different answer. You should have seen the runaround when I asked for specs for building a "gun vault". Yeesh. [/tinfoil hat]