The creators of Mythbusters have a new show coming out, and it sounds pretty incredible. Imagine Battlebots, but the robots were actually full-sized cars, and they used real guns. You've just described Weaponizers.
Yes, it's a show all about modding cars into remote-controlled war machines and then having them take each other on. How amazing does that sound? There are also obstacle courses to be run through involving exploding targets. Seriously, I think the Discovery Channel invaded my dreams to come up with the idea for this show.