The following link exposes a current bug in the game that lets players duplicate items.
https://www.youtube.com/watch?v=cHvpXsJTZpw
I advise you watch this video and its entirety immediately before the video is removed by the person who posted it, due to upset players in the comment section complaining about how he has exposed their way of exploiting the game for their benefit.
in case its removed:
1:Join a game with a bag full of stuff you want to duplicate
2:Hold the bag of stuff in your hands and leave the game
3: Join the same game you left
4: once you join the game again you quickly hold X leave after dropping the bag
5: Dont forget to hit Exit now after holding X dropping the bag
The video shows an example which shows the player performing these actions, with captions reading:
After the bag is out of your hands leave fast
once your at the main screen quickly join a random server
once you join a random server you should have the bag in your hands
once you are in, if you see the bag in your hands that means you did it right
then leave and join the other game you dropped the original bag in
you should see the old bag on the ground if you did it right