Mart,
It has a very basic teetering rotor.
The
United States - FAA ~ Ultralight (Part 103) was never intended for rotorcraft. The maximum allowable empty weight is 254 lbs., and this leaves no room for 'extras'.
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Edited to add;
A 'rigid' rotor will give more control authority. However, a two-blade rotor with offset flapping hinges or a hub spring will result in 2/rev vibration. A three-blade rotor will overcome this vibration but it will also take the weight over 254 lbs.
Dave