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What is a J#### serial number?

April 26, 2017serial

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What is a J#### serial number?

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Glock prototypes and other parts for internal use only are given a special serial number. The number is a J followed by four numbers (J####), J1234 for example. This number is used because the letter J is not included in any other Glock gun codes.Back To TopLE Marked GlocksLaw enforcement agencies often order Glocks with special serial numbers, usually using the initials of their department.