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Pump Action – a slide action shotgun
A pump-action shotgun is one in which the handgrip can be pumped back and forth in order to eject a spent round of ammunition and to chamber a fresh one.
The weapon has a single barrel above a tube magazine into which shells are inserted. New shells are chambered by pulling the pump handle attached to the tube magazine toward the user, then pushing it back into place to chamber the cartridge (in a few cases this action is reversed). This action simultaneously projects the most recently fired shell out of the ejection port.
