Thats my take on the internals but you'll need to custom fabricate most of it since it doesn't look anything like any airsoft gun I've ever seen. Other than being a bullpup it doesn't look much like a FAMAS either. Those also aren't that close to G36 optics. G36 optics have a much smaller lens, isn't as bulky, and the carry handle is much thinner. It does kinda resemble G36 optics in basic shape but you'd still have to redo pretty much all of the exterior to get it to look right.