Ghk m4 airtac hpa adapter

I ended up ordering 2 of these, 1 for me and 1 for a friend who has now decided that he doesn’t want it and I can no longer return it to get my money back so am selling it, only taken out of the box for pictures. Comes with all adapters and the batteries are sold separately from BZ tactical (they designed an 11.1v lipo...