Im looking for some of you long time AR guys to give me some suggestions or advise about some of the better companies out there manufacturing AR parts for upper recievers. I am in the process of building my first Ar. Basically what Im looking for is the names of companies that you have been happy with there equipment. My lower is done, ( C3 lower, dpms stock and parts kit) Now Im looking for some good upper recievers and barrels. 16" barrel and either a A2, or A4 reciever. I have been told by friends to go with C3, JD, or Yankee Hill on the reciever, and Stag on the barrel. Thanks.