Let's assume that I registered a Glock 17 on a Form 1 as an SBR for use in a CAA Micro Roni. My question is, What may I do with the Glock 17 when it is not installed in the chassis? Basically, is it considered an NFA item when not installed? May I carry it concealed? I'm a Texas resident and am licensed. May I carry the pistol alone across state lines? Along the same lines, Is a registered AR lower under NFA restrictions if a rifle length upper is attached?