The wheels are unprotected, but small and not that easy to touch. The hammer itself is quite hard to damage.
Its only major flaw is that it is not invertible and can't self-right with its weapon, as Raptor can.
The DSL version of Bushido is a hammer/popup called Samurai.
Samurai has proved to be one of the toughest DSL 2.1 MWs. Has a decent wedge and fairly fast speed. The weapon can easily damage exposed undersides.