So I understand that when you fire an automatic rifle the gas sends the working parts rearward to pick up the next bullet, but when the last round is fired the working parts are fully rear and the hold open recess stays open. Why does it do this?
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Others have answered, but I just want to point out that not all self-loading firearms are gas-operated and not all self-loading firearms have a last round bolt hold-open (LRBHO) or slide-lock on empty.
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