Well... when one looks at the phrase "the right of the people to keep and bear Arms" in the Second Amendment, there's no distinction between the people. In other words, not everyone may own a gun, but they have a right to. With that being said, I'm of the opinion that gun-owning U.S. Citizens wouldn't necessarily qualify as being a protected class.

We also need to consider what the government considers a protected class. For instance, the following is a list of current federal protected classes in regards to employment: Race, color, religion or creed, national origin or ancestry, sex, age, physical or mental disability, veteran status, genetic information, and citizenship.

Now, I'm not saying it wouldn't be nice if gun owners fell into the list of protected classes. Unfortunately, I don't think we'll ever see it.

A person owning a gun is not in a protected class, the Right to own is protected.

I’m not so sure that it exactly puts us in a protected class but what it does do is grant us a constitutionally protected, enunciated right and those are hard to take away or undermine. I know the Democrats, progressives and liberals will try their damnedest to do exactly that but the constitution is on our side