Montana’s strong culture of gun ownership makes private transfers a daily occurrence, but the lack of a state registry makes a Montana Gun Bill of Sale even more critical. In 2026, this document serves as your only private proof of transfer. It records the buyer’s Montana State ID and the firearm’s serial number, providing a definitive record of the exchange. Should the firearm ever be traced back to you after the sale, this signed receipt is your primary evidence to clear your name with law enforcement.
How to fill out a Montana Gun Bill of Sale
Montana Firearm Transfer FAQ
Is a Bill of Sale required in Montana?
Montana law does not require a bill of sale, but it is the best way to document a 'good faith' transfer. It provides proof that you are no longer responsible for the firearm if it is ever lost or stolen.
Are background checks required for private sales in MT?
No. Montana does not require universal background checks for private transfers between residents. However, you must not sell to anyone you know is prohibited.
What is the minimum age for a private sale in Montana?
In Montana, a resident can purchase a firearm in a private sale at age 18. This applies to both handguns and long guns.
Is there a waiting period in Montana?
No. Montana has no mandatory waiting period. The sale is final as soon as the Bill of Sale is signed and the firearm is exchanged.
Who is a 'prohibited person' in Montana?
Convicted felons (specifically those involving the use of a weapon), drug addicts, and those adjudicated as mentally ill.
Can I sell a high-capacity magazine in Montana?
Yes. Montana has no restrictions on magazine capacity or 'assault weapon' features for private sales.
What ID should I verify?
Always verify a Montana Driver's License to ensure the buyer is a state resident. Recording a Concealed Weapons Permit (CWP) number is even better, as it shows the buyer passed a background check.
Can I sell to a resident of Wyoming or Idaho?
No. Federal law strictly prohibits private, person-to-person sales across state lines. Interstate transfers must go through an FFL dealer.