Montana has some of the most permissive gun laws in the United States. It is unique in having no state-level prohibited possessor statute, although the state preemption statute allows local governments to prohibit firearms possession among felons and mental incompetents.
Montana is a "shall issue" state for concealed carry. The county sheriff shall issue a concealed weapons permit to a qualified applicant within 60 days. Concealed carry is not allowed in government buildings, financial institutions, or any place where alcoholic beverages are served. Carrying a concealed weapon while intoxicated is prohibited. No weapons, concealed or otherwise, are allowed in school buildings. Montana recognizes concealed carry permits issued by most but not all other states. Concealed carry without a permit is generally allowed outside city, town, or logging camp limits. Transporting a firearm in a motor vehicle is legal. Open carry is also generally permitted.
Montana has state preemption of most firearms laws. Local units of government may not prohibit, register, tax, license, or regulate the purchase, sale or other transfer, ownership, possession, transportation, use, or unconcealed carrying of any weapon. However, local governments may restrict the firing of guns, or the carrying of firearms at public assemblies or in public buildings or parks.
Montana has a number of restrictions on lawsuits against firearms manufacturers, dealers, or trade associations. Such lawsuits may be filed by the state, but not by local governments.
Montana House Bill 246, the Montana Firearms Freedom Act, was signed into law by Governor Brian Schweitzer on April 15, 2009, and became effective October 1, 2009. This legislation declares that certain firearms and firearms accessories manufactured, sold, and kept within the state of Montana are exempt from federal firearms laws, since they can not be regulated as interstate commerce.