US Marine Corps parachute riggers hold a primary MOS of 0451 (Air Delivery Specialist) and serve predominantly with an Air Delivery Platoon that is resident within each Marine division’s logistic group. Air Delivery Specialists also serve in other USMC units that have an airborne capability such as reconnaissance units (both division and force level), US Marine Corps Forces Special Operations Command, and Air Naval Gunfire Liaison Companies. Air Delivery Specialist assigned to any of the aforementioned units, provide additional combat support as they are integrated into those formation's quick reaction force.