I never experienced Olympic arms but I heard of their less than stellar reputation. I don't feel comfortable when you compare NEA to Anderson arms. At the very least they innovated by making a lube free coating with their ARs. I wouldn't trust it but there's nothing stopping you from running it wet regardless. At the very least their parts appear to be mil spec so you are guaranteed a certain level of compatibility. NEA/BCL makes their parts proprietary for no damn reason and it doesn't help that their QC is garbage.