I asked what kind of guns are not considered guns.
I believe (as in "I've been told" and I've seen some supporting evidence, but I do not really know the law in this regard) that the legal/federal definition of "firearms" does not include "cartridge-less" guns, such as black-powder muskets. (I seem to recall there is/was a revolver that fit into this category?)
But you're an NRA instructor and would know this better than I...?
Am I wrong?
I'm sorry! (My mind is racing all over the place)
I believe that firearms made before 1898 are exempt & are not considered a 'firearm'. A friend of mine here, who is far more knowledgeable than I am on the matter, said that there are quite a few .32 cal revolvers that you can buy w/o a license, registry, etc.
I don't know if there are only specific models, but there are a few exemptions to the rule.