The sale of guns and ammunition will be exempt from the state's 7% sales tax Friday through Sunday in Mississippi.

Named for the constitutional right to bear arms, the exemption was signed into law by Gov. Phil Bryant in 2014.

Even without a state law, a store in Oxford is offering a 7 percent discount on books the same three days.

Square Books will collect the state sales tax but discount its prices by the same percentage. General manager Lyn Roberts says the discount celebrates the First Amendment right of free speech.

Roberts says this is the second year for the store to offer the book discount. She says "it's not against" the Second Amendment weekend, but this is a way of honoring other constitutional rights too.