What do the numbers on a shotgun mean?

Answer 1

There are numbers stamped onto the sides of a firearm's barrel.

sometimes there will be writing as well. Such numbers will be the the Serial Number(s). Possibly on the same line or above or below will be a Model number, and or, Model Name or designation. There might be the Caliber or Guage or Bore of the firearm. In the case of shotguns, the length of the barrel's Chambre will be present; IE; 2 1/2", 3", 3 1.4" , etc; so as to warn the User not to incorrectly chamber a shell of the wrong size which is easlily and dangerously done. Much the same applies to the firearm action regarding numbers and writing. If you are unsure of your understanding of what you have, consult a gunsmith, firearms officer or somewone who uses a firearm in their employment. Really! There are numbers stamped onto the sides of a firearm's barrel.

sometimes there will be writing as well. Such numbers will be the the Serial Number(s). Possibly on the same line or above or below will be a Model number, and or, Model Name or designation. There might be the Caliber or Guage or Bore of the firearm. In the case of shotguns, the length of the barrel's Chambre will be present; IE; 2 1/2", 3", 3 1.4" , etc; so as to warn the User not to incorrectly chamber a shell of the wrong size which is easlily and dangerously done. Much the same applies to the firearm action regarding numbers and writing. If you are unsure of your understanding of what you have, consult a gunsmith, firearms officer or somewone who uses a firearm in their employment. Really!