The Assault Amphibious Vehicle (AAV)—official designation AAV-7A1 (formerly known as LVTP-7)—is a fully tracked amphibious landing vehicle manufactured by U.S. Combat Systems (previously by United Defense, a former division of FMC Corporation).
AAVP-7A1 (Personnel): This is the most common AAV, as it carries a turret equipped with an M2HB .50 caliber heavy machine gun, and a Mk19 40mm automatic grenade launcher. It carries four crew radios as well as the AN/VIC-2 intercom system. It is capable of carrying 25 combat equipped Marines in addition to the crew of 4: driver, crew chief/vehicle commander, gunner, and rear crewman.