Weighing in at under one ounce, the nimble Blade® mSR RTF takes ultra-micro helicopter performance to the next level. It comes from the factory completely assembled and flight tested with everything you need to get flying. At the heart of the Blade mSR’s design is a Bell-Hiller rotor head that provides the kind of speed and agility you would expect of a single-rotor heli but maintains a measure of positive stability similar to a co-axial heli. This blend of agility and stability makes it the ideal “next step” for someone moving up from a coaxial heli, such as the B  Perfect for anyone who has flown a Blade CX3 or mCX