When the 3310 Requirement Is Triggered
Federal law requires licensed firearms dealers to report the sale or other disposition of two or more pistols, revolvers, or other handguns to the same person within five consecutive business days. This includes any combination of sales, pawns redeemed and resold, or transfers — the ATF looks at the net result, not the individual transaction type.
The rule applies to handguns only. Long gun sales do not trigger the 3310 requirement under federal law, though some states and ATF demand letters have expanded reporting to include certain semi-automatic rifles in specific border states (currently Texas, California, Arizona, and New Mexico).
The five-business-day window resets with each qualifying transaction. If a customer buys one handgun on Monday and another on Thursday, that's a reportable event. If they buy one on Monday and another the following Wednesday — six business days later — it is not.
Important: The five-day window applies to business days, not calendar days. Weekends and days your store is closed do not count. However, if you operate seven days a week, every day is a business day for this calculation.
How to Complete Form 3310.4 Correctly
Form 3310.4 requires dealer information, purchaser identification details, and a description of each firearm involved in the multiple sale. The form must include the manufacturer, importer (if applicable), model, caliber or gauge, serial number, and type of each firearm.
The purchaser section requires the buyer's full legal name, date of birth, address, and government-issued identification details — the same information captured on the 4473. Cross-reference your 4473 to ensure consistency. Any discrepancy between the 3310 and the corresponding 4473s will draw scrutiny during an inspection.
Both the dealer and the purchaser must sign the form. The purchaser's signature acknowledges that the information is true and correct. If the buyer refuses to sign, you are still required to file — note the refusal on the form and proceed with submission.
Common Mistakes That Get Dealers Cited
The most common 3310 violation is simply failing to file at all. Dealers who rely on manual tracking often miss the five-day window because they don't have a system that flags when the same buyer crosses the two-handgun threshold. By the time the next transaction processes, the filing deadline has already passed.
Other frequent errors include incomplete firearm descriptions, mismatched buyer information between the 3310 and corresponding 4473s, late filing beyond the one-business-day deadline, and failing to send copies to both the ATF and your local chief law enforcement officer (CLEO).
Serial number errors are particularly damaging. If the serial number on your 3310 doesn't match the 4473 or your bound book, the ATF will flag it as a recordkeeping discrepancy — which can cascade into a broader investigation of your inventory accuracy.
Filing Deadlines & Where to Send It
You must prepare and submit ATF Form 3310.4 no later than the close of business on the day after the date of the second (or subsequent) qualifying transaction. That means if the second handgun sale happens on Tuesday, the form must be filed by end of business Wednesday.
Copies must be sent to two recipients: the ATF's National Tracing Center in Martinsburg, West Virginia, and your local CLEO — typically the chief of police or county sheriff in the jurisdiction where the sale occurred. You must also retain a copy for your records.
Filing can be done by mail, fax, or through the ATF's electronic submission system (eForm 3310.4). Electronic filing is faster, creates an automatic audit trail, and eliminates the risk of lost mail.
Tracking Multi-Sale Transactions in Your POS
Manual tracking of the five-day rolling window is error-prone and essentially impossible at volume. If you process more than a handful of handgun sales per week, you need a system that automatically monitors buyer history and alerts you when a multiple-sale threshold is triggered.
Bravo's Gun Store POS tracks every handgun transaction by buyer and automatically flags when a second qualifying sale occurs within the five-day window. The system pre-populates the 3310 form with the buyer and firearm details already captured in the transaction, eliminating duplicate data entry and ensuring consistency with the 4473.
Penalties for Non-Compliance
Failure to file Form 3310.4 is treated as a willful violation if the ATF can demonstrate that the dealer knew or should have known about the requirement. Since the obligation has been in effect since 1975 and is explicitly covered in ATF FFL training materials, ignorance is not a viable defense.
A single willful violation can result in FFL license revocation. In practice, the ATF typically issues warning letters for first-time failures, but repeated non-compliance — or failure to correct the issue after a warning — triggers the revocation process. Under the ATF's enhanced enforcement posture since 2022, inspectors are specifically trained to verify 3310 compliance during every inspection.
ATF enforcement reality: Form 3310.4 violations accounted for a significant share of the ATF's revocation actions in FY2024. The bureau has publicly stated that failure to report multiple handgun sales is treated as a high-priority enforcement matter because of its direct link to firearms trafficking investigations.
Automating 3310 Reporting with Bravo
The most reliable way to never miss a 3310 filing is to remove the manual tracking entirely. When your POS system monitors the five-day rolling window, auto-generates the form, and alerts your team the moment a filing is due, the compliance burden effectively disappears.
Bravo's compliance suite handles 3310 reporting as part of the transaction workflow. The system automatically identifies qualifying multi-sale events, pre-fills the form data, and queues it for review and submission — all before the filing deadline. No spreadsheets. No calendar reminders. No missed filings.
Never Miss a 3310 Filing Again
Bravo auto-detects multiple handgun sales and pre-fills Form 3310.4 — so you never miss a deadline.
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