Buddy of mine removed his gear (large ALICE pack and plate carrier) just prior to server shutting down/resetting. We returned and found he was still wearing his gear and the gear he removed prior were still in game duplicating grenades, the MP5SK, etc.

I believe a possible exploit could be that someone takes gear off prior to shutting their game down/disconnecting their internet from their Xbox. Friends collect the gear and he/she returns still having gear.