i have one of the early ics m16 a3's with the olympic arms trades. came stock with nylon bushings and turbo 2000 motor. which have long since been changed out. i bought around march/april 2006.
the olympic arms trades are the rare ones to have/find. i cant remember who found the info for me but it was someone from these forums. in order for ics to have the rights to have the trades on the rifles ,,the product had to be inspected by olympic arms themselves. ics does not do this anymore which is why you see the colt markings.