From Guns.com:

Announced late Thursday, the Axe is compact, with a 16-inch barrel and 26-inch overall length. Chambered in .410 bore, it feeds through a side loading gate and has a magazine tube that holds five 2.5-inch shells. While threaded for invector-style chokes, it is not technically a shotgun and is instead classified as a “firearm” by the Bureau of Alcohol, Tobacco, Firearms & Explosives, which means it is not regulated under the National Firearm Act.