As used in this title, unless the context otherwise requires:
15 "Short-barreled shotgun" means a shotgun having one or more barrels less than eighteen inches [45.72 centimeters] in length and any firearm made from a shotgun, whether by alteration, modification, or otherwise, if the firearm, as modified, has an overall length of less than twenty-six inches [66.04 centimeters].
N.D.C.C. § 62.1-01-01