Yes. The Mossberg 500A1 is a .12 gauge shotgun.
The M500A1 service shotgun primarily consists of a receiver, barrel, stock, and action, with key components including the trigger mechanism, magazine tube, and safety features. However, it does not include major components like a rifle barrel or interchangeable rifle sights, as it is designed specifically for shotgun use. Additionally, accessories such as tactical lights or slings are not considered major components of the shotgun itself.
50-100 yrs if taken care of