Well, I AM a lawyer and from reading just those two articles provided above and not researching farther, it states that a "business" who buys more than $600 worth of products or services from a provider will have to send a 1099 form to that provider at the end of each tax year....
so, first of all, I don't see where it applies to 'individuals" who buy more than $600 worth of products or services from a provider....
and second, if you are a business and are buying firearms, purchase up to $599.99 from each provider and you don't have to worry about it....

Dave