Missouri Knife Laws

Lawful with conditions · read 2026-09-04

Missouri permits most edged steel, but attaches conditions that catch buyers out. Concealed blades over 4in are restricted; St. Louis is stricter.

Concealed carry in Missouri is capped at 4 inches of blade. A blade over that ceiling carried out of sight is an offence regardless of why it was carried.

Open carry carries no statewide length ceiling in Missouri. Sheathed, visible and plainly for work or display is the safest posture anywhere in the union.

Missouri does not preempt local ordinance. Cities and counties may — and do — write stricter law than the capital, so the town you are standing in matters as much as the state.

What Missouri says, pattern by pattern

Automatic (switchblade)Lawful

Balisong (butterfly)Lawful

Gravity or ballistic knifeLawful

Dirk, stiletto or double-edgedRestricted

Concealed blade-length ceiling4 in

Open-carry blade-length ceilingNo statewide ceiling

Cities may write stricter lawYes

Towns in Missouri that are stricter

Municipal code read 2026-09-04. A town ordinance may only tighten the state's rule, never loosen it.

St. Louis
The city writes stricter carry limits than the state.
St. Louis Rev. Code §15.130

Can this house ship steel to Missouri?

Shipping is possession, not carry — most provinces permit ownership of what they forbid on the street. Warborn Blades ships to buyers of age in the United States and Canada, and the counter refuses a barred road before a card is ever touched.

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Steel that is lawful to own in Missouri

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This reading is drawn from published Missouri statute as it stood on 2026-09-04. Law changes. It is offered freely as a reading of law and is not legal counsel. Where your carry matters, ask a lawyer in your own province.