What Is the Legal Age to Purchase Ammunition in Colorado?

If you’ve ever asked “how old do you have to be to buy ammo in Colorado?”, the answer is more straightforward than it used to be.

In Colorado, the general minimum age to purchase ammunition at retail is 21.

This requirement comes from C.R.S. § 18-12-116, which established a statewide standard for ammunition sales.

What the Law Says (C.R.S. § 18-12-116)

Under Colorado law, a retail ammunition vendor:

Cannot sell ammunition to anyone under 21
Must verify age using a valid government-issued photo ID
Must keep ammunition secured and not freely accessible to the public

This applies to retail ammunition sales throughout the state.

Important Exceptions to the 21 Rule

Like most firearm laws, there are specific exceptions.

Certain individuals between 18 and 20 years old may still be able to purchase ammunition in limited situations, including:

At a shooting range
If they are active military or a veteran
If they have completed a hunter education course
If they are the subject of a protection order
Individuals who meet specific grandfathering criteria under the law
On-duty peace officers
Rimfire ammunition purchases

These exceptions are narrow and situation-dependent, but they do exist.

Online Ammo Purchases in Colorado

The law also applies to ammunition purchased online and shipped to your residence.

In those cases:

The delivery service must verify the recipient is 21 or older
The package must be signed for upon delivery

This ensures age verification applies both in-store and online.

Penalties for Violations

Violations of Colorado’s ammunition sales law can result in:

A civil infraction for a first offense
A Class 1 misdemeanor for repeat offenses
Certain delivery violations may also be charged as a Class 1 misdemeanor

These penalties are primarily directed at vendors, but they directly impact how ammunition is sold and transferred.

Bottom Line

If someone asks:

“What is the legal age to buy ammo in Colorado?”

21 years old for retail ammunition purchases, unless a specific exception applies.

Q&A: Ammo Purchase Laws in Colorado

What is the legal age to buy ammunition in Colorado?

21 years old for most retail purchases under C.R.S. § 18-12-116.

Can an 18-year-old buy ammo in Colorado?

Generally, no, but there are limited exceptions such as:

Shooting ranges
Military or veteran status
Hunter education certification
Rimfire ammunition

Do you need ID to buy ammo in Colorado?

Yes. A valid government-issued photo ID is required to verify age.

Can ammo be shipped to your house in Colorado?

Yes, but the delivery must:

Verify the recipient is 21 or older
Require a signature upon delivery

Is rimfire ammo treated differently?

Yes. Rimfire ammunition is treated differently under the law and may fall under an exception.

What law covers ammo purchases in Colorado?

C.R.S. § 18-12-116 governs retail ammunition sales in Colorado.

Final Thoughts

Colorado now has a clearly defined framework for ammunition purchases.

21 is the standard age
Exceptions exist, but are limited
Both in-store and online purchases are regulated

If you’re buying ammunition, expect age verification every time—no matter how you purchase it.

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Legal Disclaimer

Legal Disclaimer: This information is provided for educational purposes only and does not constitute legal advice. Firearm laws can change, and local, state, federal, tribal, and municipal regulations may vary. Always verify current laws and consult a qualified attorney before carrying a firearm or making legal decisions related to self-defense. US Firearms Training Academy assumes no liability for actions taken based on this content.