I agree with Strelok the gun looks amazing if you realy need a RIS or RAS mount on it then try the grip rail kit. it will give you the ability to ad any grip or ris bipod you want and the stays looking epic
also in the past I have found front mounts that allow you to have the bayonet atttachment still haven't found any but I am starting to come arround to them.
but yeah if you want to put a different frontset on this gun then maybe a front grip set like this myte help ( http://shop.ehobbyasia.com/accessori...aeg-black.html
) but A++ on the photos and the gun looks killer.