Montana - MT Gun Laws

No state permit or license is required to buy a rifle, shotgun, or handgun in Montana. Every dealer purchase runs through the standard federal background check (NICS via Form 4473), with the usual federal age minimums — 18 for a long gun, 21 for a handgun. There's no state waiting period and no state-added purchase restrictions beyond what federal law already requires.

Montana does not require a background check for private firearm sales or transfers between Montana residents. Buying from a private party rather than a licensed dealer means no NICS check, no state permit, and no paperwork trail under state law. Federal law still applies — a private seller may not knowingly transfer to someone they believe is a prohibited possessor.

Montana follows the standard federal prohibited-persons categories: felony conviction, certain domestic violence convictions or active protective orders, unlawful drug users, individuals adjudicated mentally defective or committed to a mental institution, fugitives from justice, dishonorable military discharge, undocumented immigration status, and renunciation of U.S. citizenship. Montana does not layer significant additional state-specific categories on top of the federal list, and the state has no red-flag/extreme risk protective order law.

Legal without a permit for anyone 18 or older who can otherwise legally possess a firearm (MCA 45-8-316). Montana has no separate permit requirement for open carry distinct from its permitless concealed-carry framework.

Permitless — eligible persons 18 or older are specifically excluded from Montana's concealed-carry misdemeanor statute (MCA 45-8-316(3)), so no permit, background check at the point of carry, or training is required. A separate exception (MCA 45-8-317) also covers people engaged in outdoor activities like hunting, fishing, and camping where carrying a weapon is customary. Montana still issues an optional CCW permit for residents who want one, mainly useful for concealed carry reciprocity when traveling to states that don't recognize Montana's permitless standard.

No permit or license is required to carry a firearm, loaded or unloaded, concealed or openly, in a vehicle in Montana — the state's permitless carry framework covers vehicle transport the same as carrying on foot. The main restrictions are the same sensitive-location rules that apply anywhere else (see Restricted Locations) and the standard prohibition on possession by someone legally disqualified.

Montana's restricted-location list is shorter than most states: K-12 schools and school buses, federal buildings, and financial institutions are the main categories under state and federal law. Local governments retain authority under the preemption statute (MCA 45-8-351) to prohibit concealed and unconcealed weapons specifically in publicly owned and occupied buildings under their jurisdiction — courthouses, city halls, and similar — so always check posted signage on government buildings even though the broader preemption law otherwise blocks local firearm ordinances.

There is no general Montana law setting a minimum age for possessing a firearm. The one specific statutory restriction: a parent, guardian, or other person with custody of a child under 14 may not permit that child to carry or use a firearm in public unless the child is accompanied by a parent/guardian, or under the supervision of a qualified firearms safety instructor or an adult authorized by the parent or guardian. Above that, Montana leaves supervised possession largely to parental discretion rather than a hard statutory age floor.

None. Montana has no magazine capacity limit and no assault weapons ban, and state preemption law (MCA 45-8-351) blocks any city or county from creating one locally.

Montana is a stand-your-ground state — a person who is lawfully in a place or location and threatened with bodily injury or loss of life has no duty to retreat or summon law enforcement before using force, including deadly force, as long as they reasonably believe it's necessary (MCA 45-3-102). Castle Doctrine applies with equal strength inside the home, and Montana's broad justifiable-use-of-force law extends similar protection to other places a person has a right to be, including an occupied vehicle.

Montana has broad state preemption under MCA 45-8-351 — cities, counties, towns, and other local government units are barred from enacting or enforcing ordinances that regulate the purchase, sale, possession, ownership, transfer, licensing, registration, or use of firearms, ammunition, or firearm accessories, except where a state statute explicitly authorizes it. The one carve-out: local governments can still prohibit concealed and unconcealed weapons in publicly owned and occupied buildings under their own jurisdiction (courthouses, city halls, etc.) — narrower than a blanket ban, and worth checking before assuming full statewide uniformity on government property specifically.

Montana Department of Justice, firearms-related resources: dojmt.gov
Montana Code Annotated, Title 45, Chapter 8 (full text): leg.mt.gov
Your local Sheriff's Office or Police Department: for optional CCW permit applications
ATF: for federal NFA questions — Montana does not add state-level restrictions on suppressors beyond federal requirements, so a federally-compliant suppressor is legal to own and use here