Pursuant to ATF Ruling 2016-5, how should the alternate markings be applied to satisfy the requirements of, and comply with, the existing United States Government (USG) contract?

Lot numbers must be unique to the manufacturer, even if subcontractors are utilized.  Please use the guidance noted below:    
  1. Lot number sequences comply with MIL-STD-130 (marking and identification of government property) and MIL-STD-1168C; and
  2. lot numbers are comprised of only Roman letters and Arabic numerals, or solely Arabic numerals (cannot contain special characters other than a hyphen); and
  3. only one lot number is used for each production run unless the contract specifies otherwise.
Last Reviewed January 25, 2017