The EFVP1 with a three-man crew would conduct the signature mission of the United States Marine Corps, expeditionary maneuver warfare from seabases by initiating amphibious operations from 20–25 miles over-the-horizon and transporting 17 combat-equipped Marines to inland objectives. The fully armored, tracked combat vehicle would have provided lethal firepower to disembarked or mechanized infantry with its own fully stabilized MK46 weapon station with the 30 mm cannon and 7.62mm machine-gun.
The EFVC1 provided the same survival and mobility capabilities found in the EFVP1. The EFVC1 would have been employed as a tactical command post for maneuver unit commanders at the battalion and regimental level. The EFVC1 would have provided the supported commander and selected staff with the ability to communicate, via on-board communications, with senior, adjacent, and subordinate maneuver units. The EFVC1 is armed with only a 7.62mm machine gun.