"No state shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any state deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws."
If the right to "keep and bear arms" isn't one of the "privileges or immunities of citizens of the United States," what is?
14A changed the relationship between citizens, the states and the federal government a great deal from that of the original constitution, probably more than those who passed and ratified it intended it to.