What Are the Magazine Capacity Limits in Montana?
Woody's answers are based on published federal and state law. Not legal advice. Consult a licensed attorney for your specific situation.
Montana has no state-level magazine capacity limits. You can legally possess and use magazines of any capacity under Montana state law.
What This Means for You
Montana is among the most permissive states for magazine capacity, placing no restrictions on standard or high-capacity magazines. This gives builders maximum flexibility when selecting magazines for their builds. Federal restrictions on manufacturing new full-auto magazines still apply, but standard semi-auto magazines face no state limitations.
The Detail
Montana state law does not impose any capacity restrictions on magazines for rifles, pistols, or shotguns. You can legally purchase, possess, and use magazines holding any number of rounds, whether that's a 10-round hunting magazine or a 100-round drum. This puts Montana in stark contrast to states like California or New York that heavily restrict magazine capacity.
The absence of state restrictions means you're only dealing with federal law, which primarily concerns itself with fully automatic weapons and their associated feeding devices manufactured after 1986. Standard semi-automatic magazines face no federal capacity limits, so Montana residents enjoy essentially unrestricted access to magazines of all types and capacities.
While Montana doesn't restrict magazines, some local jurisdictions theoretically could impose their own rules, though this is extremely rare in Montana's political climate. Most Montana counties and municipalities align with the state's pro-gun stance. However, you should verify local ordinances if you're in a larger city or unique jurisdiction.
Federal facilities, military bases, and certain federal properties may still have their own restrictions regardless of Montana state law. Additionally, if you travel to other states with your firearms, you'll need to comply with their magazine laws, which could be significantly more restrictive than what you're used to in Montana.
Build Impact
You can select magazines based purely on performance, reliability, and intended use rather than artificial capacity limits. This freedom lets you optimize your build for its intended purpose without legal compromises on magazine selection.