Gun serial numbers are used in gun registration and are usually linked to an owner who is usually required to hold a firearms license. The legal requirement for affixing a serial number to firearms is a relatively recent requirement, and usually applies to firearms manufactured domestically or which are imported. Besides a widespread numerical base, they may contain letters and other typographical symbols, or may consist entirely of a character string positioning and form of such identifiers is idiosyncratic. There is no international uniformity in gun serial numbers.
The bolt of an Arisaka military rifle, which carries identifiers matching the main serial number which is on the receiver.Ī gun serial number is a unique identifier assigned to a singular firearm.