Semiautomatic Rifle

A semi-automatic rifle is a type of rifle that fires a single bullet each time the trigger is pulled, without the need to manually operate a bolt, lever or other firing or loading mechanism. Such a rifle can fire single rounds in this manner until the firearm's supply of cartridges is depleted. They are also commonly known as self-loading rifles ('SLR') or auto-loading rifles.
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Any repeating rifle which utilizes a portion of the energy of a firing cartridge to extract the fired cartridge case and chamber the next round, and which requires a separate pull of the trigger to fire each cartridge.