What Are the Magazine Capacity Limits in Missouri?
Woody's answers are based on published federal and state law. Not legal advice. Consult a licensed attorney for your specific situation.
Missouri has no state-level magazine capacity restrictions. You can legally possess and use magazines of any capacity under Missouri law, though federal regulations still apply to certain items like those manufactured during the federal AWB.
What This Means for You
This puts Missouri among the more permissive states for magazine capacity, meaning your build choices aren't constrained by arbitrary round limits. You can select magazines based on intended use, reliability, and personal preference rather than navigating complex capacity restrictions that exist in other states.
The Detail
Missouri operates under a constitutional carry framework and generally takes a hands-off approach to magazine restrictions. The state has not enacted any laws limiting the capacity of magazines for rifles, pistols, or shotguns. This means standard capacity magazines, extended magazines, and drum magazines are all legal to possess, purchase, and use within the state.
While Missouri doesn't restrict magazine capacity, you still need to be aware of federal regulations. Pre-ban magazines from the 1994-2004 federal assault weapons ban period don't carry any special legal significance today since that ban expired, but certain federal restrictions on destructive devices and other NFA items still apply. Additionally, if you travel to other states, their magazine capacity laws will apply to you while you're in their jurisdiction.
The absence of capacity restrictions in Missouri extends to both residents and non-residents visiting the state. You can bring standard capacity magazines from other states without concern, and Missouri-based manufacturers and retailers can sell magazines of any capacity without state-level restrictions. This regulatory environment has made Missouri attractive to firearms manufacturers and has supported a robust market for magazine accessories.
For builders, this means you can focus on functionality and reliability rather than compliance with arbitrary capacity limits. Whether you're building a precision rifle, home defense carbine, or competition pistol, magazine selection can be based purely on what works best for your intended application.
Build Impact
You can choose magazines based on what actually works best for your build rather than what some arbitrary law allows. This means you can optimize for reliability, weight, or capacity depending on whether you're building for precision work, competition, or general use.