I am looking for information on the G3 and Cetem parts kits that are out there. I am pretty much a beginner "gunsmith". I can put AR's together; but then again who can't? Anyways I would like to try to build a Cteme or G3 but need to know how complicated the kits will be. What special tools are needed? I don't have any special machining equip. or headspace capabilities. I have heard that you need to do something special with the barrels, can't remember what it was though. Any help and Info is very much appreciated!!