The R60 is part aluminium and plastic. The fFreya is plastic. BUT... the plastic in the R60 is crap and the plastic in the Freya is carbon impregnated nylon, big difference. Most chinese kits use the crap plastic and most japanese kits use higher quality plastic, in fact that goes for most of the materials and the quality of the molds etc...While the Freya costs more you do get a much higher quality product.