MP5-Look Parts Kit For GSG-522

A German Sports Guns spokesman talked about these kits shortly after the HK lawsuit, but this is the first time I've seen these parts for sale.  CDNN Investments has the parts available to make your GSG-522 look like an HK MP5.  At $19.99, I think the price is really reasonable.

Direct link to the GSG-522 to GSG-5 parts kit @ CDNN.

Although I think some of the changes made to create the GSG-522 were genuine improvements, there's no reason you couldn't mix and match parts.