Duplication bug:
What I noticed is: when a player who already has a "big" weapon on his back (M4, mosin, SKS), and is walking arround with another "big" weapon in HIS HANDS (take into hands option) and is leaving the game. Then when the animation of sitting is being played, the gun that he was holding during when he was online is being placed on the ground, but it still stays in his inventory. When the person is going back online he has the gun in his inventory and the other one on the ground. BANG! DUPLICATION BUG!