How old is a Mass Arms Co 12 gauge 28 inch barrel shotgun?

The age of a Mass Arms Co 12 gauge shotgun with a 28-inch barrel can vary significantly, as the company was known to produce firearms primarily in the late 1800s to early 1900s. To determine its specific age, you would need to look for serial numbers, specific model information, or markings that could provide more context. Generally, shotguns from this manufacturer could be over a century old, making them antique collectibles.