I was looking at the vfc hk 416 and i was wondering how common the parts were for it. I know that the real steel is suppose to be an m4 upgrade but im not sure if the parts will be compatible. my reason of thinking comes from the glock and m&p guns. the real steel m&p intnerally are taken from glock. the airsoft guns are not compatible. If im wrong please correct me. but let me know about the vfc hk416 replacement part availability.