Cyma CM041 H with some rail covers will get you most of the way there.
Then HK 416A5 stock:
Then it's that forward grip thing, drum mag, red dot sight and a barrel extension + flash hider.
https://www.combatsouth.co.uk/cyma-cm041-h-mp5-with-m4-style-stock-platinum-edition/
https://www.firesupport.uk/ec-hk-416-a5-stock-and-stock-tube.html