Semi-automatic rifle

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A semi-automatic rifle is an auto-loading rifle that fires a single round of ammunition at a time. It uses part of the fired cartridge's energy to eject the case and automatically loads another cartridge into its chamber.^[1][2] This is in contrast to bolt-action or lever-action rifles, which require the user to manually chamber a new round before they can fire again, and fully automatic rifles, which fire continuously while the trigger is held down.^[3][4]