Bag model for preons

A dynamical model is proposed for composite quarks and leptons, like the quarkbag model. Under some special compensation conditions the chiral violations are small and the sizes and the energy levels of composite fermions are quantized. Expressions are obtained for magnetic moment of the composite system in the limit of its vanishing size with the collective motion taken into account. It is shown that for the Hararishon model one cannot get satisfactory values of the magnetic moments for all composite fermions simultaneously