If it's not set up as an AW, there's no reason to try to register it. If you have a fixed Mag without a BB or a featureless set up, there's no need to register it. You'll only be inviting the man into your life and whoever else is with you!
Your lower can't be one named in the original AW ban, hence the term off list lower. Then there's all the other B.S. items, flash hider, folding or collapsible stock...
I'm sure you know about them and you can bring your rifle if it's configured correctly and don't need to register it. They're not going to tell you, sure bring in your AW as its okay. They don't want to get sued or deal with it if something happens.
They used to have an exception for AW's if you were attending a match. You had to have paperwork showing you were in the match and had to travel to it and remove it from the state at the end of the match.