How to Legally Own a Gun in Colorado: Laws, Background Checks, and Permits

Meta description: Learn how to legally own a gun in Colorado, including eligibility rules, background checks, waiting periods, safe-storage requirements, and concealed-carry permits.

Legally owning a gun in Colorado involves more than buying one from a retailer. State and federal laws set rules for who may possess firearms, how purchases are screened, when a buyer can take possession, and how guns must be stored or carried. Colorado also regulates private sales, magazine capacity, and firearms in certain locations. Understanding these requirements—and checking for changes before acting—can help owners avoid costly legal problems.

Who Can Legally Own a Gun in Colorado?

Colorado residents generally may own firearms if they are not prohibited under federal or state law. A person can be barred from possessing a gun because of certain felony convictions, qualifying domestic-violence convictions, a current qualifying protection order, or other circumstances defined by law. Federal restrictions also apply, including restrictions for some people with specified criminal histories, fugitives from justice, and people unlawfully using or addicted to controlled substances.

Eligibility depends on the person’s specific circumstances. A past conviction, dismissed case, sealed record, or protection order can raise questions that are not answered by a general summary. A person who may be prohibited should not possess or attempt to buy a firearm until an attorney or appropriate authority clarifies the situation. A background-check approval does not necessarily resolve every separate legal restriction.

Age requirements

Colorado generally prohibits selling or transferring a firearm to a person under 21, subject to statutory exceptions. Federal law also sets minimum ages for purchases from licensed dealers: generally 18 for rifles and shotguns and 21 for handguns. Exceptions under state or federal law can apply in limited situations, including certain hunting, military, law-enforcement, or supervised activities. Because the rules differ by firearm type and transaction, a person under 21 should confirm the applicable exception before possessing or acquiring a gun.

Buying a Firearm From a Colorado Dealer

Colorado does not require a general state-issued license to own a firearm or a permit simply to purchase one. However, most buyers must complete a background check before a dealer can transfer the firearm. The dealer typically submits the required information to the Colorado Bureau of Investigation (CBI), which conducts the state’s firearm eligibility check and may consult federal records.

The buyer usually completes federal Form 4473 and provides identification. The dealer can delay or deny a sale if the check returns a disqualifying result, requires further review, or cannot be completed under applicable procedures. Buyers should answer all questions truthfully. Providing false information on a federal firearm form can be a serious crime.

The three-day waiting period

Colorado generally requires a buyer to wait at least three days after a background check is initiated before taking possession of a firearm. The period is commonly described as a 72-hour waiting period, but the statutory wording and calculation matter. The law includes exceptions for certain transactions and circumstances. Buyers should ask the dealer how the waiting period applies to their purchase rather than assume that a background-check approval allows immediate pickup.

Private Sales and Firearm Transfers

Colorado generally requires a background check for private firearm sales and transfers, not just purchases from licensed dealers. A private seller typically arranges the check through a licensed dealer, who conducts the process and may charge a fee. The buyer and seller should confirm that the transfer is lawful and keep transaction records where appropriate.

Some transfers are exempt under state law, such as certain temporary transfers, transfers between immediate family members, or transfers involving inheritance. The exact exemption requirements matter; a family relationship does not automatically make every transfer lawful. Federal law also restricts transfers to people who live in another state, with limited exceptions. When a transfer crosses state lines, a licensed dealer is generally required to handle it.

Before a private transfer, both parties should consider whether the recipient is legally eligible to possess the firearm. A seller who has reason to believe a buyer is prohibited should not proceed. If the exemption or procedure is uncertain, a licensed dealer or attorney can help clarify the lawful route.

Magazine Capacity and Firearm Restrictions

Colorado generally prohibits the sale, transfer, or possession of a “large-capacity magazine,” defined by state law as a magazine capable of accepting more than 15 rounds. The law includes exceptions, and questions can arise about older magazines, permanent modifications, and whether a magazine can readily be converted to hold more than 15 rounds. Owners should not assume that a magazine is lawful based only on its appearance or purchase date.

Colorado and federal laws may also restrict particular firearm types or configurations. These rules can change through legislation, court decisions, and effective-date provisions. Before buying, modifying, or bringing a firearm into Colorado, owners should check current state statutes and official guidance. A firearm that was lawful in another state may be subject to different Colorado requirements.

Safe Storage and Lost or Stolen Firearms

Colorado law requires firearms to be stored securely in circumstances covered by the state’s safe-storage rules. In general, when a firearm is not in use, it must be stored in a manner that a reasonable person would believe makes it inaccessible to juveniles and other unauthorized users. A locked container, gun safe, or qualifying locking device can help meet storage obligations, but the right method depends on the situation and the firearm.

Safe storage is also a practical way to reduce accidental access, theft, and misuse. Ammunition can be stored separately, and owners should choose a lock or safe that is appropriate for the household. If a child or prohibited person lives in or visits the home, keeping a firearm unloaded and locked away is especially important.

Colorado requires a firearm owner to report a lost or stolen firearm to law enforcement within five days after discovering the loss or theft. Prompt reporting can help authorities investigate and may protect the owner from complications if the gun is later used in a crime. Owners should record identifying details, such as make, model, and serial number, and retain them securely.

Carrying a Gun in Colorado

Open carry

Open carry is generally permitted under Colorado law for people who may legally possess firearms, but local restrictions and location-specific rules can apply. Some municipalities regulate open carry, and state law restricts firearms in certain sensitive places. A person should not assume that a firearm may be carried openly everywhere simply because open carry is generally lawful statewide.

Concealed carry permits

Carrying a concealed handgun generally requires a valid Colorado concealed-handgun permit, subject to statutory exceptions. Permits are issued by county sheriffs. Applicants generally must meet age and eligibility requirements, complete the required training, and submit an application and fingerprints for a background check. A permit does not authorize carrying in every location, and it does not override federal restrictions.

Colorado’s concealed-carry training requirements changed under legislation enacted in 2026, with new requirements taking effect July 1, 2026. Applicants should check current CBI and county-sheriff instructions for the required course, instructor qualifications, documentation, fees, and renewal rules. Training providers may not all meet the state’s requirements.

Permit holders should also check reciprocity before carrying in another state. Colorado’s permit is not automatically recognized nationwide, and each state has its own rules on permits, prohibited locations, transport, and use of force. When traveling, confirm the destination state’s current laws and federal rules for transporting firearms.

Where Firearms May Be Prohibited

Colorado law restricts firearms in certain locations, including specified government buildings and other designated sensitive places. Additional restrictions may apply on school grounds, in courthouses, at private businesses, or on property where the owner prohibits firearms. Federal law separately restricts firearms in places such as certain federal facilities and airport security areas.

Rules can depend on the exact location, the type of permit held, whether the firearm is secured in a vehicle, and whether an exception applies. Signs are useful but are not the only source of restrictions. Before carrying, check the laws that apply to the building or property and follow lawful instructions from the property owner or authorities.

Transporting and Bringing a Gun Into Colorado

When transporting a firearm, keep it secured and follow the laws of every state along the route. Federal law provides limited protection for certain interstate trips when a firearm is lawful at the origin and destination and is transported unloaded and inaccessible, but that protection has conditions and does not legalize a firearm prohibited at the destination.

Someone moving to Colorado should review state rules on possession, magazine capacity, and firearm configuration before bringing firearms into the state. A person purchasing a gun in another state generally must follow federal interstate-transfer rules; residents usually cannot take direct delivery of a firearm from an out-of-state seller unless the transaction is handled through a licensed dealer as required by law.

Practical Checklist for Legal Gun Ownership

• Confirm eligibility: Review federal and Colorado disqualifiers before possessing or purchasing a firearm.
• Check age and firearm type: Apply the correct state and federal age rules and verify any exception.
• Use the proper transfer process: Complete required background checks for dealer purchases and most private transfers.
• Allow for the waiting period: Confirm the applicable three-day rule and any statutory exception with the dealer.
• Check magazines and firearm configuration: Verify that each item complies with current Colorado restrictions.
• Store and report responsibly: Secure firearms as required and report a loss or theft within five days of discovery.
• Understand carry rules: Obtain a concealed-handgun permit when required and check location restrictions before carrying.

Where to Verify Current Colorado Gun Laws

Firearm laws are subject to amendments, court rulings, and changes in agency procedures. For current information, consult the Colorado Bureau of Investigation Firearms InstaCheck Unit, the Colorado General Assembly for statutes, and the relevant county sheriff for concealed-handgun permit applications. Federal rules are available from the Bureau of Alcohol, Tobacco, Firearms and Explosives.

These resources can help confirm procedures, but they do not replace legal advice for an individual case. When eligibility, an exemption, a transfer, or a particular firearm is uncertain, obtaining advice from a Colorado firearms attorney before acting is the safest course.