Abstract: A burst fire control mechanism for an automatic fire arm including a bolt longitudinally displaceably disposed in a receiver comprising a hammer mechanism pivotally mounted in the receiver; a trigger assembly pivotally mounted in the receiver including a portion engagable with the hammer mechanism for permitting the hammer mechanism to pivot; selector blade means for pre-selecting a number of rounds to be fired and having safety, semi-automatic and burst fire firing configurations pivotally mounted in the receiver rearward of the trigger assembly and including means engagable with the trigger assembly for selecting one of the safety, semi-automatic and burst fire firing configurations; a burst fire control mechanism, mounted in the receiver rearward of the selector blade means, including means engagable with the bolt for counting the pre-selected number of fired rounds and means engagable with the selector blade means after the pre-selected number of rounds have been fired and counted for causing the selector