Wisconsin Code § 941.26

Machine guns and other weapons; use in certain cases; penalty
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(1c) In this section:
(a) “CS gel” means nonatomizing, gel-form
chlorobenzalmalononitrile.
(b) “Machine gun” has the meaning given in s. 941.25 (1).
(1g) (a) No person may sell, possess, use or transport any
machine gun or other full automatic firearm.
(b) Except as provided in sub. (4), no person may sell, possess, use or transport any tear gas bomb, hand grenade, projectile
or shell or any other container of any kind or character into which
tear gas or any similar substance is used or placed for use to cause
bodily discomfort, panic, or damage to property.
(1m) No person may take a firearm that is not designed to
shoot more than one shot, without manual reloading, by a single
function of the trigger and modify the firearm so that it does
shoot more than one shot, without manual reloading, by a single
function of the trigger.
(2) (a) Any person violating sub. (1g) (a) is guilty of a Class
H felony.
(b) Any person violating sub. (1m) is guilty of a Class F
felony.
(c) Except as provided in par. (d), any person who violates
sub. (1g) (b) regarding the possession, noncommercial transportation or use of the bomb, grenade, projectile, shell, or container under sub. (1g) (b) is guilty of a Class A misdemeanor.
(d) Any person who violates sub. (1g) (b) regarding the possession, noncommercial transportation or use of the bomb,
grenade, projectile, shell, or container under sub. (1g) (b) in selfdefense or defense of another, as allowed under s. 939.48, is subject to a Class D forfeiture.
(e) Any person who violates sub. (1g) (b) regarding the sale or
commercial transportation of the bomb, grenade, projectile, shell,
or container under sub. (1g) (b) is guilty of a Class H felony.
(f) Any person who violates sub. (1g) (b) regarding the use of
the bomb, grenade, projectile, shell or container under sub. (1g)
(b) to cause bodily harm or bodily discomfort to a person who the
actor knows, or has reason to know, is a peace officer who is acting in an official capacity is guilty of a Class H felony.
(g) Any person who violates sub. (1g) (b) regarding the use of
the bomb, grenade, projectile, shell or container under sub. (1g)
(b) during his or her commission of another crime to cause bodily
harm or bodily discomfort to another or who threatens to use the
bomb, grenade, projectile, shell, or container during his or her
commission of another crime to incapacitate another person is
guilty of a Class H felony.
(3) This section does not apply to the sale, possession, modification, use or transportation of any weapons or containers under
sub. (1g) or (1m) to or by any armed forces or national guard personnel in the line of duty, any civil enforcement officer of the
state or of any city or county. This section does not apply to the
sale, possession, modification, use, or transportation of weapons
under sub. (1g) (a) or (1m) to or by any person duly authorized by
the chief of police of any city or the sheriff of any county. This
section does not apply to the restoration of any weapon under sub.
(1g) (a) or (1m) by a person having a license to collect firearms as
curios or relics issued by the U.S. department of the treasury.
The restriction on transportation contained in this section does
not apply to common carriers.
(4) (a) Subsections (1g) to (3) do not apply to any device or
container that contains a combination of oleoresin of capsicum or
CS gel and inert ingredients but does not contain any other gas or
substance that will cause bodily discomfort.
(b) Whoever intentionally uses a device or container described under par. (a) to cause bodily harm or bodily discomfort
to another is guilty of a Class A misdemeanor.
(c) Paragraph (b) does not apply to any of the following:
1. Any person acting in self-defense or defense of another, as
allowed under s. 939.48.
2. Any peace officer acting in his or her official capacity.
Notwithstanding s. 939.22 (22), for purposes of this subdivision,
peace officer does not include a commission warden who is not a
state-certified commission warden.
3. Any armed forces or national guard personnel acting in the
line of duty.
(d) Whoever intentionally uses a device or container described under par. (a) to cause bodily harm or bodily discomfort
to a person who the actor knows, or has reason to know, is a peace
officer who is acting in an official capacity is guilty of a Class H
felony.
(e) Whoever uses a device or container described under par.
(a) during his or her commission of another crime to cause bodily
harm or bodily discomfort to another or who threatens to use the
device or container during his or her commission of another
crime to incapacitate another person is guilty of a Class H felony.
(g) 1. Any person who sells or distributes a device or container described under par. (a) to a person who has not attained 18
years of age is subject to a Class C forfeiture.
1m. Subdivision 1. does not apply to an actor who is a parent,
guardian, or legal custodian of a person who has not attained 18
years of age if the actor gives the person the device or container.
2. A person who proves all of the following by a preponderance of the evidence has a defense to prosecution under subd. 1.:
a. That the purchaser or distributee falsely represented that
he or she had attained the age of 18 and presented an identification card.
b. That the appearance of the purchaser or distributee was
such that an ordinary and prudent person would believe that the
purchaser or distributee had attained the age of 18.

c. That the sale was made in good faith, in reasonable reliance on the identification card and appearance of the purchaser
or distributee and in the belief that the purchaser or distributee
had attained the age of 18.
(j) Whoever intentionally sells a device or container described
under par. (a) without providing the purchaser with a proper label
on the device or container and written safety instructions for using the device or container is guilty of a Class A misdemeanor.
(k) 1. Except as provided in subd. 2., any person who has not
attained the age of 18 years and who possesses a device or container described under par. (a) is subject to a Class E forfeiture.
2. Subdivision 1. does not apply if the person’s parent,
guardian, or legal custodian purchased the device or container for
him or her or gave the device or container to him or her.
(L) Any person who has been convicted of a felony in this
state or has been convicted of a crime elsewhere that would be a
felony if committed in this state who possesses a device or container described under par. (a) is subject to a Class A misdemeanor. This paragraph does not apply if the person has received
a pardon for the felony or crime.
(m) The department of justice may not promulgate or enforce
any rule that regulates a device or container described under par.
(a).
(5) 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.

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