MK18 Tokyo Marui GBBR with HPA Adapter

Hi I'll sell my Mk18 I switched to HPA. So that's why I have no use anymore. The weapon has minor upgrades see photo. It's there 
new bolt, buffer, spring and charging handle installed.
But I still have the old parts. I'll give you a grip and a handstop 
magpulu set and six PTS Midcap stacks.
I live in Vienna, but I don't have a mission.
The price is debatable.