Terms of Use and Disclaimer

Last updated: June 21, 2026

By using CaliberAPI (the "site"), you agree to these terms. If you do not agree, please do not use the site.

This site provides firearms-related information for adults who are legally eligible to purchase and possess firearms. By using it, you confirm that you are old enough to do so in your jurisdiction (generally at least 18, and 21 for handguns purchased from a licensed dealer, with some states requiring 21 for all firearms) and that you are not otherwise prohibited by law from owning or possessing firearms. The site is informational only, does not sell or transfer firearms, and is not intended for anyone who cannot legally own or possess one.

1. Informational use only

The compatibility data, specifications, and other information on this site are provided for general informational and research purposes only. We compile data from manufacturer materials and other sources and cite those sources, but we do not guarantee that any information is accurate, complete, current, or free of error. Specifications change and sources can be wrong.

2. Firearms safety disclaimer

Mounting an optic to a firearm carries real risk. Compatibility information on this site is a starting point for research, not a guarantee of fit, function, or safety. Before mounting any optic, adapter plate, or component, confirm compatibility directly with the firearm and optic manufacturers, follow their official instructions and torque specifications, and consult a qualified gunsmith if you are unsure. Improper mounting can cause malfunction, property damage, or serious injury. Always follow safe firearm handling practices and verify that a firearm is unloaded before working on it. You assume all risk for decisions made using information from this site.

3. Not legal advice; follow the law

Nothing on this site is legal advice. Firearms laws vary by jurisdiction and change over time. You are solely responsible for complying with all applicable federal, state, and local laws regarding firearms and accessories.

4. Affiliate links and third parties

The site contains affiliate links; see our Affiliate Disclosure. We are not responsible for the products, services, or content of third-party sites, and a link is not an endorsement of any product's safety or fitness for a particular purpose. Any purchase is solely between you and the retailer.

5. No professional relationship

We are not your gunsmith, attorney, or advisor, and using this site does not create any such relationship.

6. Intellectual property and use of data

The design, text, and the original compilation of data on this site are owned by CaliberAPI. The underlying facts and manufacturer specifications are not owned by us, and where we quote or reference a source we attribute it. You may use the information for your own personal, non-commercial reference. You may not scrape, resell, or redistribute the dataset, in whole or in part, without our written permission.

7. Disclaimer of warranties

The site is provided "as is" and "as available," without warranties of any kind, whether express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, accuracy, and non-infringement.

8. Limitation of liability

To the maximum extent permitted by law, CaliberAPI and its operator will not be liable for any direct, indirect, incidental, consequential, or other damages arising out of or related to your use of, or inability to use, the site or its information. This includes, without limitation, damage to firearms, optics, or other property and any personal injury, even if we have been advised of the possibility of such damages.

9. Indemnification

You agree to hold CaliberAPI and its operator harmless from any claims, losses, or expenses arising out of your use of the site or your reliance on its information.

10. Changes

We may update the site and these terms at any time. Your continued use of the site means you accept the updated terms.

11. Governing law

These terms are governed by the laws of the United States and the state in which the site's operator resides, without regard to conflict-of-laws principles.

12. Contact

Questions about these terms? Email hello@caliberapi.com.