U.S. Marine Corps Dictionary

Rock and Roll

An alliteration of lock and load, it means to begin an action, to start. In Vietnam, it also meant to set the M16A1 to full-automatic fire (full-automatic fire used up ammunition so fast that later models were modified to fire only three-round blasts with each pull of the trigger on automatic).


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DevilDogCorps.com is an unofficial online dictionary of terms and acronyms commonly used within the United States Marine Corps.