This is just my take on things, but a weapon is a weapon if:
1. It is clearly stated in the lawbooks that it is a weapon.
2. If you think the majority of other people's opinions are that it's a weapon.
The first is easy, but the second is tricky. I've found out that automatics are actually fine legally, especially if I can obtain a written affadavit from the DA. On the other hand, I'll have hard time explaining that one even to an average police officer. So, because it does not fill the second requirement, I've decided not to have automatics in the first place.
However, manual folders seems to be just fine, no matter how they look. Well, all except the Sifu maybe.
Even the Carnivour has not been giving me any hassles from where I live. So as far as I'm concerned, it meet both requirements and does not qualify as a "weapon".
I suppose the best thing to do is to just ask, but creep it in cautiously. By the way, Dave. What is this "tactical folder" you speak of?