Just to clarify, i was under the impression that the uppers were to come with the parts installed, making the uppers complete, but they are actually complete stripped uppers, just containing the parts required to finish the uppers. The installation is very simple, and able to be done with basic tools and a punch.
My apologies on this issue, i misunderstood how they were to come to us, as i was somehow thinking that they were coming with parts installed already. Sorry if this causes anyone any problems, i need to read the description better next time.