Ok, so I went in to install a Systema M130 today in my M15a4. Obviously have metal bushings.
Now, the thing is, after tossing it in and making sure everything was good, I plugged in my new 9.6V 3300mah battery.... And the piston came back almost all the way and locked up. Every time I pull the trigger, the piston just kinda budges about 1/16th of an inch and then goes back to where it was. Opened it back up and double checked on everything, and still i get the same.
Any ideas of whats going on? Is an M130 to much for a stock CA gearbox?