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SB1176 • 2026

Modifies provisions relating to firearms

Modifies provisions relating to firearms

Crime Firearms
Passed Legislature

This bill passed both chambers and reached final enrollment, even if later executive action is not shown here.

Sponsor
Mosley, Angela; House handler: N/A
Last action
2026-01-27
Official status
Second Read and Referred S Transportation, Infrastructure and Public Safety Committee
Effective date
2026-08-28

Plain English Breakdown

Using official source text because the generated explanation was unavailable or could not be confirmed against the official bill text.

Modifies provisions relating to firearms

The following summaries of this bill are available: Print All Summaries Introduced Print SB 1176 - This act creates and modifies provisions relating to firearms.

What This Bill Does

  • The following summaries of this bill are available: Print All Summaries Introduced Print SB 1176 - This act creates and modifies provisions relating to firearms.
  • ASSAULT WEAPONS (Section 571.023) This act provides that no person, corporation, or other entity in Missouri shall manufacture, import, possess, purchase, sell, or transfer any assault weapon or large capacity magazine as defined in the act.
  • Any person in violation of this act shall be guilty of a class C felony.
  • This act shall not apply to government entities or agents, law enforcement officers, manufacturers selling to government entities, properly licensed firearms dealers, and any person legally in possession of an assault weapon or large capacity magazine prior to the effective date of this act.

Limits and Unknowns

  • This entry is temporarily using official source text because the generated explanation could not be confirmed against the official bill text during the last sync.

Bill History

  1. 2026-01-27 S237

    Second Read and Referred S Transportation, Infrastructure and Public Safety Committee

  2. 2026-01-07 S67

    S First Read

  3. 2025-12-01 Missouri House of Representatives and Missouri Senate

    Prefiled

Official Summary Text

The following summaries of this bill are available:

Print All Summaries

Introduced

Print

SB 1176 - This act creates and modifies provisions relating to firearms.

ASSAULT WEAPONS (Section 571.023)
This act provides that no person, corporation, or other entity in Missouri shall manufacture, import, possess, purchase, sell, or transfer any assault weapon or large capacity magazine as defined in the act. Any person in violation of this act shall be guilty of a class C felony.

This act shall not apply to government entities or agents, law enforcement officers, manufacturers selling to government entities, properly licensed firearms dealers, and any person legally in possession of an assault weapon or large capacity magazine prior to the effective date of this act.

This provision is identical to SB 1337 (2026), and to a provision in SB 346 (2025), SB 405 (2025), SB 1100 (2024), SB 971 (2024), SB 330 (2023), SB 441 (2023), and HB 1533 (2020).

UNLAWFUL POSSESSION OR TRANSFER OF A FIREARM (Section 571.070 & 571.080)
This act provides that any person committed to a mental institution at 16 years of age or older is prohibited from possessing a firearm unless he or she petitions the court to remove the disqualification pursuant to current law.

Additionally, this act provides that for firearm purchasers under the age of 21, a background check is required to determine whether the individual has a juvenile record that would disqualify him or her from purchasing firearms, pursuant to federal law.

This provision is identical to a provision in SB 346 (2025), SB 971 (2024) and SB 330 (2023).
TRISTAN BENSON, JR.

Current Bill Text

Read the full stored bill text
EXPLANATION-Matter enclosed in bold-faced brackets [thus] in this bill is not enacted
and is intended to be omitted in the law.
SECOND REGULAR SESSION
SENATE BILL NO. 1176
103RD GENERAL ASSEMBLY
INTRODUCED BY SENATOR MOSLEY .
3360S.01I KRISTINA MARTIN, Secretary
AN ACT
To repeal sections 571.070 and 571.080, RSMo, and to enact in lieu thereof three new sections
relating to firearms, with penalty provisions.
Be it enacted by the General Assembly of the State of Missouri, as follows:
Section A. Sections 571.070 and 571.080, RSMo, are 1
repealed and three new sections enacted in lieu thereof, to be 2
known as sections 571.023, 571.070, and 571.080, to read as 3
follows:4
571.023. 1. As used in this section the following 1
terms mean: 2
(1) "Assault weapon", any: 3
(a) Semiautomatic rifle that has the capacity to 4
accept a detachable magazine and has one or more of the 5
following: 6
a. A pistol grip or thumbhole stock; 7
b. Any feature capable of functioning as a protruding 8
grip that can be held by the nontrigger hand; 9
c. A folding or telescoping stock; or 10
d. A shroud attached to the barrel, or that partially 11
or completely encircles the barrel, that allows the bearer 12
to hold the firearm with the nontrigger hand without being 13
burned, excluding a slide that encloses the barrel; 14
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(b) Semiautomatic pistol or semiautomatic rifle with a 15
fixed magazine that has the capacity to accept more than ten 16
rounds of ammunition; 17
(c) Semiautomatic pistol that has the capacity to 18
accept a detachable magazine and has: 19
a. Any feature capable of functioning as a protruding 20
grip that can be held by the nontrigger hand; 21
b. A folding, telescoping, or thumbhole stock; 22
c. A shroud attached to the barrel, or that partially 23
or completely encircles the barrel, that allows the bearer 24
to hold the firearm with the nontrigger hand without being 25
burned, excluding a slide that encloses the barrel; or 26
d. The capacity to accept a detachable magazine at any 27
location other than the pistol grip; 28
(d) Semiautomatic shotgun that has: 29
a. A pistol grip or thumbhole stock; 30
b. Any feature capable of functioning as a protruding 31
grip that can be held by the nontrigger hand; 32
c. A folding or telescoping stock; 33
d. A fixed magazine capacity in excess of five rounds; 34
or 35
e. An ability to accept a detachable magazine; 36
(e) Shotgun with a revolving cylinder; or 37
(f) Conversion kit, part, or combination of parts from 38
which an assault weapon can be assembled if in the 39
possession or under the control of a single person. 40
"Assault weapon" shall not include any firearm made 41
permanently inoperable; 42
(2) "Detachable magazine", either: 43
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(a) An ammunition feeding device that can be loaded or 44
unloaded while detached from a firearm and can be readily 45
inserted into a firearm; or 46
(b) A magazine that can be detached from a firearm by 47
pressing a button on the firearm either with a finger, tool, 48
or bullet; 49
(3) "Fixed magazine", an ammunition feeding device 50
contained in, or permanently attached to, a firearm in such 51
a manner that the device cannot be removed without 52
disassembly of the firearm action; 53
(4) "Large capacity magazine", any ammunition feeding 54
device with the capacity to accept more than ten rounds, but 55
excluding: 56
(a) A feeding device that has been permanently altered 57
so that it cannot accommodate more than ten rounds; 58
(b) A twenty-two caliber tubular magazine; or 59
(c) A tubular magazine contained in a lever-action 60
firearm. 61
2. No person, corporation, or other entity in the 62
state of Missouri shall manufacture, import, possess, 63
purchase, sell, or transfer any assault weapon or large 64
capacity magazine. 65
3. The provisions of this section shall not apply to: 66
(1) Any government officer, agent, or employee; member 67
of the United States Armed Forces; or peace officer, to the 68
extent that the person is authorized to acquire or possess 69
an assault weapon or large capacity magazine and does so 70
while acting within the scope of his or her duties; 71
(2) The manufacture of an assault weapon or large 72
capacity magazine by a firearms manufacturer for the purpose 73
of sale to an entity or person described under subdivision 74
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(1) of this subsection, provided that the manufacturer is 75
properly licensed under federal and state laws; 76
(3) The sale or transfer of an assault weapon or large 77
capacity ammunition feeding device by a dealer, who is 78
properly licensed under federal, state, and local laws, to 79
an entity or person described under subdivision (1) of this 80
subsection for use by that entity or person for official 81
purposes; or 82
(4) Any person who, prior to and continuously since 83
the effective date of this section, was legally in 84
possession of an assault weapon or large capacity magazine. 85
4. A violation of this section is a class C felony. 86
571.070. 1. A person commits the offense of unlawful 1
possession of a firearm if such person knowingly has any 2
firearm in his or her possession and: 3
(1) Such person has been convicted of a felony under 4
the laws of this state, or of a crime under the laws of any 5
state or of the United States which, if committed within 6
this state, would be a felony; or 7
(2) Such person is a fugitive from justice, is 8
habitually in an intoxicated or drugged condition, or is 9
currently adjudged mentally incompetent or has been 10
committed to any state mental institution at sixteen years 11
of age or older. 12
2. Unlawful possession of a firearm is a class C 13
felony, unless a person has been convicted of a dangerous 14
felony as defined in section 556.061, or the person has a 15
prior conviction for unlawful possession of a firearm in 16
which case it is a class B felony. 17
3. The provisions of subdivision (1) of subsection 1 18
of this section shall not apply to the possession of an 19
antique firearm. 20
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571.080. A person commits the [crime] offense of 1
transfer of a concealable firearm if such person violates 18 2
U.S.C. Section 922(b), 18 U.S.C. Section 922(t), or 18 3
U.S.C. Section 922(x). 4
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