Yeah I was thinking that too about the Marines, but they only have all that gear when they go on extended assignments, but most times they wont where the big huge packs if not Necessary they'd go in wearing the LBE, a Kevlar Vest, NVGs, Gas mask (depending on Mission), and depending on their Weapon other Packs for ammo, like a Grenader is going to wear a special Vest for carrying Grenades, an Ammo Bearer will cary a pack with Ammo Drums, a SAW or M60 Gunner will carry extra Ammo Space also, a Medic will have a Big med Pack (as I mentioned before) and Streacher Bearers would Have a Streacher (hints the name), so you'd need a lot of P3ds but if you got a team to work on it, it shouldn't be to difficult, I have a P3D of a Soldier with out the Bed roll, and a Flash light, that I downloaded and Edited.