(pictured) Remington 7600
Pump-action shotguns cycle rounds by sliding the forearm rearward in order to activate solid connected action bars that open the chamber, expel the spent round and allow a new one to be fed into the chamber from the magazine. They are most common among today's shotgun models, though there are a number of out-of-production and in-production rifle models available, such as the Remington Model 7600. On the shotgun side, the Remington 870 remains the best-selling shotgun in history, with more than 10 million made and sold.
Pump guns have traditionally been hailed as more reliable than autoloaders, which can jam or hang up, particularly when dirty, and much faster to cycle than a bolt- or lever-action, providing the user with the best of both worlds. Because of a rather short cycling distance, in skilled hands a pump can technically allow follow-up shots even faster than some auto-loaders. In shotguns, pump actions offer the broadest range of versatility, capable of shooting and cycling every type of load.
In practical terms, pumps often offer the best mix of value and safety, since a user has to physically cycle a live round into the chamber for it to be ready to fire, and because of fewer parts and more basic technology than a semi-auto can be made and sold for much less. Where the cost of most semi-autos has soared well above the [imo-slideshow gallery=28],000 mark, a solid performing pump gun capable of slinging both buckshot or slugs can still be had for as low as $250 to $500. Disadvantages are that because of the need for a sure grip to cycle the forearm rearward, pump guns can be clunky and tend to rattle some.