Many of the MOLLE (Modular Lightweight Load-carrying Equipment) packs used by the Marines were made by Specialty Defense Systems at three U.S. plants聴another maker had a smaller contract. Who makes them is less important than who designed them, and in this case the MOLLE was designed by the Natick Soldier Systems Center, where lots of military gear is designed, with help from a Philadelphia outfit called Defense Supply Center. MOLLE packs are designed around what military people require, which is basically lots of places for lots of stuff. Its strong suit is organization, but it can also carry big loads聴during tests, troops said it was OK with 120 pounds! But you聮re talking about very fit 20 year olds, too.
MOLLE Military Backpack

Not sure you need the body armor bit, but MOLLE packs are suitable for everyday use and are widely available on the Internet (try ). Cost is usually around $75.
Keep in mind the MOLLE pack isn聮t designed with civilians in mind. There聮s no sleeping back compartment, for instance. But it does have a good suspension system聴probably better-engineered than a lot of climbing packs聴and the price is right!
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