The MOLLE Large Ruck capacity is 4000 cubic inches. The side sustainment pouch capacity is 500 cubic inches each.

The top flap of the Large Ruck is a mesh pocket for small reference and information materials. It is secured with a hook and loop closure.

The Large Ruck shoulder straps and waist belt sometimes come pre-assembled to the Frame. The other components are provided as add-ons, that can be attached as needed.

The Large Ruck has two large, removable Sustainment Pouches which attach to the side of the ruck using the same interlocking attachment system as the FLC pockets. These Sustainment Pouches each contain two D-rings on the sides, which allow them to be carried by the General Purpose Sling for alternate uses.

The Sustainment Pouches can also be added to the side of the smaller MOLLE Assault Pack to add 1000 cubic inches (2 x 500) to its capacity. All of the large pouches of the MOLLE system have D-rings on the sides to allow the item to be slung with a GP sling.