The Assault Pack Module acts as a standalone, ultra-low profile pack that can also be attached to the back of The CTOMS 2nd Line Main Pack. It easily zips on and off and shares the same compression straps. Both the main pack and the Assault Pack Module can be opened when they are attached without removing the Assault Pack. As a system, the main 2ndLine™ Pack can be used to carry personal items or extended care items and the Assault Pack Module can carry immediate trauma treatment supplies. It can then be detached from the main pack and worn as a standalone on target, leaving the larger, heavier main pack in a vehicle or at the door.