The Mossberg-500 was a series created by O.F. Mossberg & Sons. The Mossberg is currently the number one selling shotgun and second in total production to the Remington 870.
A common nickname for the Mossberg-500 is "Model 500", because there were multiple Mossberg’s that bear different model numbers.

This 12 gauge shotgun features a folding stock. But the US Military had problems with the stock bending and breaking, and later models feature an better folding stock, and sometimes, Just an plain old stock.

The shotgun's capacity is 5 2.75-inch (70 mm) shells. There are also variants that allow it to hold more ammo.

Due to this shotgun having so many variants, and model numbers, information can’t be very precise. Fire Rates cannot be calculated because this is an Semi-Automatic Weapon with an Pump Feed.

The gun is popular with Armed Forces, but not so much with Civilians. It was also used in Prisons.

Edit: Fixed Grammar and Spelling.