I don't get the option to put it in my Armory.

Is there a special place we report new Battle Coloseum stuff, or just make a thread in Bugs and Glitches?

I have the same problem with a similar item. The freezegun or something? I'm wondering the same thing.

It might be because the Armory is a new feature, and not every weapon has been added to the database yet.

I was wondering the same thing. A few other items I have had trouble with. I do agree with that there are probably a lot of items not added yet.