Definition of assault rifle
: any of various intermediate-range, magazine-fed military rifles (such as the AK-47) that can be set for automatic or semiautomatic fire
also
: a rifle that resembles a military assault rifle but is designed to allow only semiautomatic fire
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Merriam-Webster unabridged














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Time Traveler for assault rifle
The first known use of assault rifle was in 1950
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