Wisconsin Statutes Crimes (Ch. 938 to 951) § 941.25. Manufacturer to register machine guns

(1) In this section, “machine gun” means any of the following:

(2) Every manufacturer shall keep a register of all machine guns manufactured or handled by him or her. This register shall show the model and serial number, date of manufacture, sale, loan, gift, delivery, or receipt, of every machine gun, the name, address, and occupation of the person to whom the machine gun was sold, loaned, given, or delivered, or from whom it was received; and the purpose for which it was acquired by the person to whom the machine gun was sold, loaned, given, or delivered, or from whom received. Upon demand every manufacturer shall permit any marshal, sheriff, or police officer to inspect his or her entire stock of machine guns, parts, and supplies therefor, and shall produce the register required under this subsection for inspection. Whoever violates any provision of this subsection is subject to a Class B forfeiture.

(3) This section does not prohibit or interfere with the manufacture for, and sale of, machine guns to the military forces or the peace officers of the United States or of any political subdivision thereof, or the transportation required for that purpose; the possession of a machine gun for scientific purpose, or the possession of a machine gun not usable as a weapon and possessed as a curiosity, ornament, or keepsake; or the possession of a machine gun other than one adapted to use pistol cartridges for a purpose manifestly not aggressive or offensive.