ATF Form 5310.12 & 5310.16 Fillable PDF – Download & Complete Online

Whether you are applying for a new Federal Firearms License (FFL) or need to add a responsible person to an existing license, the ATF’s Form 5310.12 and Form 5310.16 are essential. Formize provides a secure, fillable PDF that lets you complete both forms directly in your browser – no extra software required.

What Is ATF Form 5310.12?

Form 5310.12 is the official application used to request any type of FFL (Dealer, Manufacturer, Importer, etc.). It collects business information, background details, and the specific license class you are seeking.

Understanding Form 5310.16 – Responsible Person Questionnaire

Form 5310.16 (also known as Part B) is a questionnaire that must be completed by every responsible person added to an FFL. It includes personal background questions, fingerprint instructions, and a photo requirement.

How to Fill Out the Forms Online with Formize

Follow the simple steps below to fill the PDF without leaving the page.

• Click the "Fill out this form" button on the page.
• Wait a few seconds while the Formize PDF Filler app loads.
• Enter your information directly into the fillable fields.
• Use the Save button to download a completed copy or Print it for mailing.
• Mail the printed form to the ATF address shown on the form instructions.

Common Mistakes to Avoid

• Leaving required fields blank – the filler highlights empty mandatory sections.
• Using an outdated form version – our PDF is the latest revision (effective 2022).
• Submitting the wrong mailing address – double‑check the address on the form’s last page.
• Forgetting the fingerprint card for Form 5310.16 – attach it before mailing.

Where to Submit Your Completed Forms

After completing the forms, mail them to the ATF’s Federal Firearms Licensing Center (FFLC) at the address printed on the last page of each form. For expedited processing, consider using certified mail with tracking.

Need more help? Review the ATF’s official instructions linked on each form or consult a qualified firearms attorney.