What should be marked on the rear of a shotgun barrel?

The rear of a shotgun barrel should prominently display the shell gauge and the length of the chamber. This information is crucial for hunters and shooters because it indicates the size of the ammunition that the shotgun is designed to use. Knowing the gauge helps prevent the use of incorrect shells, which can lead to malfunctions or dangerous situations. The length of the chamber must also match the length of the shotshells to ensure safe and effective operation.

Other details, such as the manufacturer name, type of shotgun, or serial number, are important for identification and record-keeping but do not provide immediate operational information necessary for safe use of the firearm in the field. Ensuring that shooters can easily identify the gauge and chamber length helps promote safe hunting practices and responsible firearm ownership.