The Crewcab is our variable-capacity, do-anything military pack. It can be compressed into a low-profile, 1900 cu in pack. Or expanded to 5000 cu in. It can carry EOD gear, Pelican cases, Packbot 310s, Load Cells, ammo cans, even cas evacs in a pinch. For additional storage, add the DaypackLid. The Crewcab excels at carrying weird loads well.
The BVS versions adds bolsters for use with hard armour.