If you go with a DPMS platform, I would easily suggest getting a Rainier Arms barrel, either their select or match. It's much lighter than a DPMS bull barrel but still accurate. Many people, that I've read, are able to get close to MOA on the Select barrel and sub-MOA with the ultra match barrel. My best 5 shot group on my select barrel was pretty close to MOA but I'm not a great shooter, it outshoots me right now.