Found what looks to be a good deal on a TNW built semi auto M2. Dealer that has it on consignment doesn't think it has been used much if at all and that is my impression as well. The thing looks to be all there and in new shape but I don't really know what all to look for. It doesn't help that the receiver alone weighs probably 60 lbs along with being a good bit more complicated than your average gun. I'm going to do some Googling but figured it was worth asking here first. What should I be looking at? Any serious no-go type issues?