It enables you to check production date of a glock using the serial number from the barrel.
Enter three letters of the serial (barrel) number on your Glock firearm: Glock Serial (Barrel) Number Lookup basesd on information from The Gun Digest Book Of The Glock. Glock Serial (Barrel) Number Lookup - Remington Model 870. On top of that, there have been changes to the line between full generations, for instance the glock 26 is available in a generation 2.5. Glock categorizes their guns as Generation 1, Generation 2, Generation 3, Generation 4, and recently Generation 5.
