The medium pack designed to carry up to 50 pounds of various existence load items, is the one generally used by most combat troops. Figure 2-13 shows front and back views. The pack is water repellent but not waterproof. Four waterproof liners are issued with each pack one large one for the main compartment and three small ones for each of the three pockets. Equipment to be carried should first be inserted in the waterproof liners, then into the main compartment and pockets. Instructions for making a watertight closure are printed on the outside of each liner.

The small pocket in the main compartment can be used to carry the AN/PRC-25 or AN/PRC-77 radio. The main flap for covering the loaded pack can be opened by pulling apart the two tabs. The camouflage cover or other small, flat objects may be stored in it. Simply pressing the flap together seals it.

Equipment hangers (webbed loops and webbing with eyelets) for use with slide keepers and/or hooks are provided on the sides of the pack and above the pockets for carrying equipment on the outside of the pack

Figure 2-14.-Buckles for closing and opening pocket flaps and main compartments.

For carrying equipment, such as a bayonet scabbard or machete sheath, the pockets are tunneled between the pockets and the main compartment. By sliding the piece down through the tunnel, it can be fastened to the hanger above it with slide keepers or hooks.

The medium pack is most commonly carried using the shoulder straps without the frame. When required, the pack can be attached to the frame and shoulder straps in the same way as is shown later for attaching the large pack to the frame.