The E9W - 15 mammoth is a heavy riot control mech used by police forces. It towers over minifigs, and is of immense psychological value. It is armed with two rocket pods on it's shoulders, a power water cannon for it's right arm, a machine gun under the cockpit, and a double-barrelled grenade launcher on it's left arm, which can be loaded with high-explosive, smoke, stun, or tear gas grenades. It has a crew of one.
Unfortunately, every time I try to add more pictures to this page, my computer freezes, so just copy and pastes the follow into your address bar for the brickshelf gallery.