From Longman Dictionary of Contemporary Englishpump-actionˈpump-ˌaction adjective [only before noun] TDa pump-action piece of equipment is operated by pulling or pressing a part in or out so that the contents come out in short burstspump-action shotgun/rifle
Examples from the Corpus
pump-action• The 1988 law banned automatic and pump-action guns and required that guns be kept in locked cabinets bolted to a wall.• The puerto Rican mass murderer was letting off a pump-action shotgun into a bus queue in downtown Los Angeles.• What was needed here, rather than meditative technique, was a pump-action shotgun.pump-action shotgun/rifle• What was needed here, rather than meditative technique, was a pump-action shotgun.• The puerto Rican mass murderer was letting off a pump-action shotgun into a bus queue in downtown Los Angeles. 