Even Gun Appreciation Day:
"I think Martin Luther King, Jr. would agree with me if he were alive today that if African Americans had been given the right to keep and bear arms from day one of the country's founding, perhaps slavery might not have been a chapter in our history," Ward said.
Of course the denial of that right was actually part of what it meant to be slave. The right of gun ownership is wholly connected to the notion of "free men." A slave, by the very American definition of the word, wouldn't generally have the right to bear firearms.
So I guess it's true that blacks wouldn't have been slaves if they had guns, much like it's true that blacks wouldn't have been slaves if there was no such thing as American slavery.