A Kel-Tec RFB, an example of a semi-automatic firearm.

A semi-automatic firearm, also known as a self-loading firearm, is a type of firearm that after firing a round, automatically performs all necessary steps to prepare it to be able to be fired again if there are still rounds in the feeding device. The trigger must be pulled once to fire a round, and pulled again to fire another. Typically, semi-automatic firearms, such as rifles, are sold to civilians, while select-fire variants of those firearms are usually reserved for use by militaries and marines.

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