[joker, the frickin ninja]

I have been looking to buy my second AEG for about a month now, and I am heavily leaning towards the ICS M4. I only have 1 quick question about it. I dont plan on upgrading it for a few months until I have more cash on hand, and even then I only plan on giving it a tightbore and maybe a light(ish) spring, so I need a battery that wont harm the internals. Does ICS build their guns similar to the way CA does where you can safely use a 9.6v battery with a stock gun? I can't really find much info on ICS internals, but sorry if I overlooked something.

Thanks in advance.