From testing there is a low chance this will work but it is possible.

1. Get a friend to host a fire team.
2. Go to tower and go to the vault
3. Deposit the item you want to duplicate into the vault.
4. Have your fire team leader go to orbit, But!
5. When it is counting down to orbit have the fire team leader tell you when it is about to be a full circle.
6. As soon as it turns to a full circle transfer the item to your inventory.
7. if the item is in your inventory while in orbit it may have been done correctly.
8. Go back to the vault and if the item is in your vault and in your inventory you have done it correctly.
9. Good luck, and don't get banned.

I will not be hosting this so don't ask me to host for you,
Before you say its not working I did it once and got an extra strange coin out of it.
It also might get patched so do it while you can.