is this bot don't lost all razors in a fight before do a damage thought
Pistons still have a bulky mesh so the wedges need to be really long (which would be impractical in nearly every design) or the bursts have to be mounted high up (which also ruins the wedge). Equipping it with a speedy drive would have been the ideal solution.
Its probably something you should have tried yourself first for the sake of being the first person with the idea..