My first thought is the A-Truck. Like the sort of vehicles that the A-Team always made out of trucks and forklifts and busses and things like that by welding armor and machine gun mounts onto them.

Or maybe The Blockader? (It looks like it might spend a lot of time sitting still and daring escaping crooks/spies/rebels/rioters to try to bash it out of the way.)

Can you tell us what its function is going to be (like are you imagining it as a police vehicle, or military, or something like that)? That might spawn some interesting names.

~*I've made it my mission to build Cyberworld, one polygon at a time*~

Watch it happen at my technology blog, Building Cyberworld.