Owning a condo and being part of an HOA myself, I can tell you this...
They can make up any HOA rule they want that doesn't conflict with law, however enforcing those rules against owners is time consuming and often expensive, so they normally try all other methods first before going the "legal" route. That said, most HOAs have a tendency to avoid making silly rules that start encroaching on civil rights that don't involve alteration of the property in some way.
As long as your not acting like an ass-hat to people, I seriously doubt you will have troubles in this state. If someone legally carrying a gun on HOA common property is seen as causing a problem, I doubt creating new HOA rules will be the first or even second way they will choose to try to handle it.
Become an HOA board member, and you will have even less of a chance of having an issue. Might even give you the chance to educate.