[Knocturnal]

I'm a little rusty here and before I throw myself back into AEG's mods and upgrades I would like to ask this community a few question's regarding G&G AEG's.

I have a whole line up of G&G AEG's but having been too busy for this hobby has left me with a few blanks... Some information is sometimes hard to come by even on the internet.

The AEG in question is the TOP TECH TR4-18 Short.
My first question, what G&G parts are usually proprietary to their AEG's?
If anyone knows if there are (excluding the gearbox) any proprietary parts to this AEG in particular, I must ask which parts are?

I have upgraded several AEG's in the past, but not G&G specifically, except for minor upgrades such as buckings or tight bore barrels. I usually find that they are amazing right out of the box, thus, limited my work done to them. Having said that, I'm planning on lowering my gear ratio for quicker trigger response, along side adding an aftermarket mosfet. It seems that I couldn't limit myself to that exclusively. Changing the gear ratio leads me to wanting to change the piston, changing the piston leads me to wanting to change the piston head, changing the piston head leads me to wanting to change the cylinder... You get the idea... If I remember correctly, the Gearbox itself is proprietary in the TOP TECH series due to the pneumatic blow back system. However, having taken the gearbox apart in the past hasn't left me with any memory of specific proprietary parts.

Further questions to come! Maybe...