Thats is why most assault troops used machine pistols in WWII.So you wouldnt have to aim much in close quarters.But even if you were shooting with an assault rifle,only your first shot is accurate.For suppressive fire there was lot better weapons like Machine guns and light machine guns.We compared single shots against shooting bursts in army with laser simulators on assault rifles and if the enemy uses ground well you dont get better results with shooting bursts.Most of the bullets would hit over the target.