The disposition of two or more pistols or revolvers to any nonlicensee during a period of 5 consecutive business days must be reported on ATF Form 3310.4, Report of Multiple Sale or Other Disposition of Pistols and Revolvers, not later than the close of the business day on the day of disposition of the second pistol or revolver. The licensee must forward a copy of the Form 3310.4 to the ATF office specified thereon, and another copy must be forwarded to the state police or local law enforcement agency where the sale occurred. A copy of the Form 3310.4 must also be attached to the ATF Form 4473 executed upon delivery of the pistols or revolvers.

A business day for purposes of reporting multiple sales of pistols or revolvers is a day that a licensee conducts business pursuant to the license, regardless of whether state offices are open. The application of the term “business day” is, therefore, distinguishable from the term “business day” as used in the National Instant Criminal Background Check System (NICS) context.

Example: A licensee conducts business only on Saturdays and Sundays, days on which state offices are not open. The licensee sells a pistol to an unlicensed person on a Saturday. If that same unlicensed person acquires another handgun the next day (Sunday), the following Saturday or Sunday, or the Saturday after that, the reporting requirement would be triggered, the subsequent acquisition of a pistol or revolver would have to be reported on a Form 3310.4 by the close of the day upon which the second or subsequent pistol or revolver was sold.

[18 U.S.C. 923(g)(3); 27 CFR 478.126a]