Infantry Turrets are fully automatic, so when it is placed it does not need attention. It acquires the target (showing "Acquiring Target" HUD) - which a member of the opposing team (which takes longer the further away from the turret it is), and then shows a "Target Locked" HUD, and then fires at a fast pace, killing the target and awarding the kill to the owner of the turret. It can only kill one player at any given time. It can only rotate 180 degrees, so it would be no use facing a small area. Only one of these can be placed at a time by one player. When more than one is placed, the one placed earlier will disappear.