There are two screws on the bottom of the stock you have to loosen up in order to disassemble the upper receiver from the stock. Then the barrel should unscrew from the receiver. Here is an in depth guide.
http://www.airsoftforum.com/board/L96-upgrade-disassembley-t156035.html
Sent from my DROID RAZR using Tapatalk 2
http://www.airsoftforum.com/board/L96-upgrade-disassembley-t156035.html
Sent from my DROID RAZR using Tapatalk 2