I was told that the FS2000 replica on display is not the finalized version.  Due to licensing issues, G&G may need to implement some changes.  The AEG was an extremely faithful reproduction of the real deal though.  From the appearance to the takedown procedures, the FS2000 replica did not disappoint.  While the undermount handguard detaches as the real firearm, the G&G representative indicated that the company currently has no plans on making any attachment add-ons.  The AEG is fully compatible with regular TM style AR platform magazines.  I did not get a chance to get into the mechbox, but it appeared to be a V6 or derivative mechbox with horizontal motor positioning.