United States Marine Guidebook Gun Gear and a back panel hydration

and a back panel hydration pocket to keep you cool on hot days

modular attachment hooks and a modular panel with two and three pouches provide space for ammo or other items

a pen slot

It also has loop panels for attaching IDs and patches

The Fleet Marine Forces Manual explains the Marine Corps' Close Combat System's approach and practices (MCSOCC)

United States Marine Guidebook Gun Gear and a back panel hydrationAll Marines use this well respected book. The history of the Marine Corps, the Code of Conduct, close order drill, first aid, rifle marksmanship, land navigation, and much more are all covered in detail. Excellent images and graphics are included.