The Manta is a light hovercraft with relatively weak lasers and large fans on its sides that it uses to move. The easiest way to dispatch enemies in a Manta is to lower the crafts height so that it is about as high as the victims waist. You get the rest.
For the Lego version of the Manta, I decided to use the Metru-Nui brown color. I didn't have the right pieces in the actual tan color of the Manta, and decided this was as close as I could get. I used two large, thin wheels with kraata tub lids on top. They are connected in a way that allows little movement, which is ideal because it is how the Manta functions. It has two bars that go over the pilot instead of the game-versions one. It also has four lasers instead of just two because I thought two was just a little wimpy :p