I colored an old sketch of a flying mech or robot with weaponized feet that could pick up a tank.
It has palm blasters and nose guns that can safely work at point blank. The sword micro-factures a disposable blade that vibrates and breaks off at certain points to leave a new sharper blade below. The sword (with the blade ejected) can be stored on the side of the mid-section below an arm pit.

This was colored with pencil and a little digital. I had posted all my other robot drawings here; http://justinnator4.deviantart.com/gallery/?catpath=%2F&q=Robot