About 250 exhibitors have reserved spots at the show.
Thirty-one-year-old James Engelking of Indianapolis was carrying an AK-47 assault rifle he hoped to sell for $900. He says he needs money to buy bunk beds for his children. He says he'll have a licensed dealer run a criminal background checks on any potential buyer.
Since the Newtown, Conn., school massacre, gun shows have come under more scrutiny because some sellers don't need to conduct background checks.