Hey, so I found this way to duplicate items (sniper rifles, knives and whatever Veduti can carry. If you take Veduti with you to the final mission, you simply equip him with anything you want to copy. Then in the mid-adventure you meet him and you can recruit him (yea you can have 2 Vedutis in your team at the same time). He has the same equipment as your First Veduti. In the end of the adventure, you drag his items into your jeep and bang, you got them x2.