Prior to disassembling the gun, it would be a good idea to fire one shot on semi-auto. This will release spring tension and make disassembling the gearbox slightly easier.

Start by removing the lower half of the handguard, as you would to install a battery.

Disconnect the two wires coming out of the receiver from the small segment of wiring with the fuse and Tamiya plug.

Using a punch or rod, push the front receiver takedown pin out from left to right, as shown. Note: the pin is captured in the receiver, and will not separate from it, so do not try to force it out.