Mossberg 500 is a series of shotguns manufactured by O.F. Mossberg & Sons. The 500 series comprises widely varying models of hammerless, pump action repeaters, all of which share the same basic receiver and action, but differ in bore size, barrel length, choke options, magazine capacity, and "furniture" (stock and forearm) materials. Model numbers included in the 500 series are the 500, 505, 510, 535, and 590.
Read more about Mossberg 500: Basic Features, Model 500 Options, Model 500 Variants, Accessories and Combinations, Maverick Arms Subsidiary, Model Numbers, Military Use