How to duplicate weapons on dead island

You have to empty you inventory, besides the weapon you want to duplicate, then you throw down your weapon when you pick it up hold that button for ten sec. Then go to storage. Put it in then take it out (that's what she said lol). Then press triangle (ps3) Y (Xbox) and throw down as many as you want,works on (1st and 2nd dead island) if u have any problems send me message on ps3 (account jbsoria) enjoy