Enlarged battery room:
   
 
The enlarged battery room is able to fit the 9.6V stick battery.
Quick separated front and back body:
 
Open receiver cover by pushing the receiver cover button.
 
Receiver cover rise but it is not able to be taken apart right now. Front end is connected with rear sight ruler base, The hand-guard tenon retracts when receiver cover rise. Then the upper hand-guard can be taken apart.
 
Disassemble upper and lower hand-guard.
 
 
 
Loose the two slotted screws beside the body and the two Phillips screws for fixing HOP-UP.
 
After pushing the front barrel and raising it, you can separate the front and back body.