The M2A3 and M3A3 Bradley are tracked armored combat vehicles. The Bradley fighting vehicles are designed to operate at the same speed as the M1 Abrams Main Battle Tank and provide better protection than the U.S. Army's M113 Armored Personnel Carrier. These vehicles are amphibious, they are equipped with inflatable pontoons and their tracks act as "propellers".
The mission of the M2A3 Bradley Infantry Fighting Vehicle is to provide mobile protected transport of an infantry squad to critical points on the battlefield. It also provides overwatching fires to support dismounted infantry and suppresses or defeats enemy tanks and other fighting vehicles.
The M3A3 Bradley Cavalry Fighting Vehicle is exactly the same chassis as the M2 IFV with some minor internal differences. The M3 is a cavalry/scout vehicle, instead of carrying an infantry squad in the payload compartment, the M3 carries a pair of scouts, additional radios, ammunition, and TOW and Javelin missile rounds. In fact, the only noticeable differences between the M2 and the M3 are that the external firing ports for the squad M16s are absent on the M3. Its primary tasks are reconnaissance, security, and flank guard missions.