Therefore, exposure time must be minimized and the shotgun breacher must be ready to gain entry and return fire as quickly as possible. When attempting either technique, the gunner is announcing his presence by using the shotgun and is completely exposed to fire through the door. The two standard techniques of shotgun breaching are the doorknob breach and the hinge breach. When done properly, the shotgun breach requires only a few seconds. Shotgun breaching is perhaps the primary role the shotgun is employed in for the military and the nations SWAT Teams.