Originally Posted by HaZarD SFD
ICS is very compatible.. only things that are ics specific are, Mechbox, Anti Reversal, Nozzle, and Hopup.. other than that.. Ver.2 parts all the way. Easily maintaned and to work on.
Now finally, I have people on my side.
Ask all ICS M4 owner, none of them won't disappoint except a few who own the halfbreed version.