How to upgrade the stock of the G&G GC7A1?
 

I know a lot of true Canadians (I'm American, I apologize, but I want to sort of imitate the Canadian military) will hate me for this, but I'm considering buying the somewhat infamous G&G GC7A1, which I know a lot of people say isn't a TRUE C7; I understand, but to each their own. I just want a gun that feels like a C7, but more specifically an A2, and the GC7A1 has a fixed stock.

Therefore my two questions are, is it possible to change the stock on this to a retractable stock, and also, where's the battery housed? Handguard or stock?

On the note of the stock, if it is retractable, can I get a parts list from sellers in the US, like Evike or Airsoft GI? I'd really appreciate some (polite) help because I just personally don't know a whole lot about airsoft and customizing guns, so any help would be appreciated.

Battery should be in the stock. You can remove the stock and install pretty much any aeg buffer tube & receiver end plate. You may need to trim the extension off the receiver shorter, but it’s not hard.

Which ones though? I know what the parts are but I need to know which ones would be best.