The Norotos Universal Shroud, P/N 1817010 accepts the standard issue A3256368 NVG swing arm without the need to change the base plate. The Norotos Universal Shroud P/N 1817010 is designed to easily mount a night vision goggle to a 3 hole or 1 Hole helmet without the need for straps. The Universal Shroud attaches to various 3 hole and 1 Hole ballistic helmets with the most common being the MICH. This Universal Shroud will also fit non ballistic helmets with the 3 hole WARCOM Pattern. If drilling is required please consult your helmet manufacture to obtain its effect on the integrity of your helmet.