What vehicle do the marines (combat engineers) use to sweep and destroy IED's?

I know they have 1 man vehicles (husky or something) that they roam around in ahead of convoy. There is this beast that they have, it has like a big arm on the top of it, that they sweep for with. What is that called? Also, I saw this tank thing that shoots these arrows, almost seems like a TOW missle out of it, and it projects these 2 straight lines that the IED;s are gone. It has HUGE ammo containers that it just ejects and can be reloaded. What is that one called?