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Meaning of slide-action

slide-ac•tion

Pronunciation: (slīd'ak"shun), [key]
— adj.
  1. (of a rifle or shotgun) having a lever that when slid back and forth ejects the empty case and cocks and reloads the piece.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.