pumpaction

pump-action

[puhmp-ak-shuhn]
adjective
(of a shotgun or rifle) having an action that extracts the empty case, loads, and cocks the piece by means of a hand-operated lever that slides backward and forward; slide-action.

Origin:
1910–15, Americanism

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pump-action
 
adj
1.  (of a shotgun or other repeating firearm) operated by a slide-action mechanism feeding ammunition from a magazine under the barrel into the breech
2.  spraying or dispensing liquid by means of a pump rather than using a propellant

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