The AAV-P7A1 Amtrack provides protected transport of up to 25 combat-loaded Marines through all types of terrain. The engine compartment can be completely water-sealed, making it seaworthy. It has an enhanced applique armor kit, or sandwich-plated steel armor, with a layer of Kevlar underneath, to protect the troops from high-caliber weapons fire. It's firepower consists of an M2 .50-cal. machine gun, an MK-19 40mm grenade launcher, and a line charge with C4 explosives for use in clearing mines. It can move at speeds of up to 45 mph on land and five knots at sea.
Source - [url=
http://www.globalsecurity.org/military/systems/ground/aavp7a1.htm] Gobal Security [/url]