Here is a "bug" to duplicate items which is legal, you need at least one person on your team to duplicate items.
How to Duplicate Items
Steps To Dupe
Collect enough Shards to revive your partner in the Forge.
Once you have the items you want to duplicate you have to give it to your partner (Weapons and Skills).
His partner has to die, committing suicide with the ''Plasma Launcher'' or being killed by an enemy.
Pickup the items from your friend died and revive him in the forge, once you revived him in the forge he kept his items.
This works with all weapons and abilitys.