They're using some type of Antitank grenade like that in Iraq I heard, it is of soviet manufacture and a lot better designed. Very effective in city fighting against armored vehicles as are most weapons.

As for the stupidest weapon designed I have to say the molotov cocktail throwers the British came up with early in the war. If I remember right one was simply a board that you pulled back and hit the bottle. Like an old Roman javelin launcher thingy thing. I think the centurions called it an "ass" as in donkey.